GOST 12.1 014 84 indicator tubes. Method for measuring concentrations of harmful substances with indicator tubes

STATE STANDARD OF THE UNION OF THE SSR

Occupational safety standards system

Method for measuring concentrations harmful substances
indicator tubes

GOST 12.1.014-84

MOSCOW

APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Standards dated December 14, 1984 No. 4362

INSTEAD OF GOST 12.1.014-79

The validity period was removed by decision of the Interstate Council for Standardization, Metrology and Certification (Minutes No. 5-94)

REPUBLICATION (January 1996) with Amendment No. 1 approved in March 1990 (IUS 7-90)

This International Standard establishes an accelerated method for measuring concentrations of harmful substances in the air of a working area with indicator tubes, except for the air of underground mine workings.

The essence of the method is to change the color of the indicator powder as a result of a reaction with a harmful substance (gas or steam) in the analyzed air sucked through the tube. The concentration of a harmful substance is measured by the length of the layer of indicator powder in the tube that has changed its initial color (linear-color indicator tube) or by its intensity (colorimetric indicator tube).

The terms used in the standard and their explanations are given in the appendix.

Characteristics of the produced indicator powders are given in the appendix.

The normalized metrological characteristics of indicator tubes and air intake devices for them are given in the appendix.

STATE STANDARD OF THE UNION OF THE SSR

Occupational safety standards system

Working area air

Method for measuring concentrations of harmful substances

indicatortubes

Occupational safety standards system.
Air of the work zone. Method of measuring unhealthy matters
concentration using indicator tubes

GOST
12.1.014-84

Instead
GOST 12.1.014-79

Introduction date 1986-01-01

1. EQUIPMENT

1.1. Indicator tubes, including those supplied by the consumer using special sets with indicator powders.

1.2. Filter tubes, including those supplied by the consumer using special kits.

1.3. An air intake device (such as a pump, bellows, etc.) designed for use with this indicator tube.

2. PREPARATION FOR MEASUREMENT

2.1. Preparation of equipment for measuring concentrations of harmful substances in the air of the working area is carried out in accordance with regulatory documentation on the indicator and filter tubes and the air intake device intended for them.

2.2. In unexplored production conditions, before carrying out measurements with indicator tubes, it is necessary to conduct a one-time qualitative assessment of the composition of the air in the working area using certified methods or guidelines approved by the Ministry of Health of the USSR. Based on the data obtained, the possibility of using indicator tubes for planned or operational control is established. Regardless of the composition of the air in the working area, the use of filter tubes with indicator tubes, if it is provided for in the regulatory documentation for indicator tubes, is mandatory in order to avoid violating the operating conditions of indicator tubes.

A repeated qualitative assessment of the composition of the air in the working area should be carried out with each change in production technology, which can cause the appearance of new harmful substances in the air.

2.1, 2.2 (Revised edition, Rev. No. 1).

3. MEASURING

barometric pressure - from 90 to 104 kPa (680-780 mm Hg);

relative humidity - 30 - 80%;

temperature - from 288 to 303 K.

Deviation from the specified parameters is allowed, if it is provided for in the regulatory and technical documentation for measuring instruments.

Control of the metrological parameters of the air in the working area should be carried out in parallel with measurements of the concentrations of harmful substances with indicator tubes.

3.2. An indicator tube is attached to the air intake device, designed to measure the concentration of a harmful substance, and filter tubes, if they are provided for by regulatory documentation.

The measurement should be started no later than 1 min after the depressurization of the tubes.

3.1, 3.2 (Revised edition, Rev. No. 1).

3.3. The amount of air sucked through the indicator tubes is set in accordance with the regulatory documentation for these tubes.

concentration ( With n) under normal conditions in mg / m 3 is calculated by the formula

where is the result of measuring the concentration of a harmful substance, at ambient temperature, t°С, relative humidity φ % and atmospheric pressure R kPa, mg/m 3 ;

K AT - coefficient taking into account the influence of temperature and humidity of the surrounding air on the readings of indicator tubes, the value of which is determined in accordance with paragraph of the appendix.

The relative measurement error (δ) should not exceed ±35% in the range up to 2.0 maximum allowable concentrations (MPC) inclusive and ±25% at concentrations above 2.0 MPC under the conditions specified in paragraph .

The measurement result is presented as: ( With H ± Δ) mg / m 3 with a confidence level of 0.95.

The value of the absolute errorDcalculated according to the formula

In the range up to 1.0 MPC, the error may increase up to ±60%. This value of the relative error must be indicated in the regulatory and technical documentation for measuring instruments.

(Revised edition, Rev. No. 1).

4. SAFETY REQUIREMENTS

4.1. When measuring the concentration of harmful substances with indicator tubes in the air of the working area, the safety standards and rules in force in this production should be observed.

4.2. Measurement of the concentration of harmful substances with indicator tubes is carried out by persons who have been trained and admitted to work on the control of harmful substances in the air of the working area.

4.3. When opening the tubes, all safety precautions when working with glass must be observed, using special devices and means of protection.

APPLICATION 1
Reference

TERMS USED IN THE STANDARD AND THEIR EXPLANATIONS

	Explanation
Work zone
Method for measuring the concentration of harmful substances	According to GOST 16263-70
harmful substance
Maximum permissible concentrations of harmful substances in the air of the working area
indicator tube	Primary measuring transducer, structurally representing a glass tube filled with granular filler (indicator powder)
Linear color indicator tube	An indicator tube that allows you to measure the concentration of a harmful substance in the analyzed air sucked through the tube along the length of the indicator powder layer in the tube that has changed its initial color
Colorimetric indicator tube	An indicator tube that makes it possible to judge the presence of a harmful substance in the analyzed air sucked through the tube at a concentration higher than the triggering concentration for this indicator tube by the color intensity of the indicator powder by comparing it with a control sample of the indicator effect
filter tube	A glass tube filled with one or more absorbers used to trap gases and vapors that interfere with the measurement of a harmful substance
indicator powder	A granular chemisorbent that changes color when a directly detectable harmful substance or its volatile products of interaction with a chemisorbent in a filter tube passes through it
Absorber	A granular sorbent or chemisorbent that completely passes the harmful substance to be determined and captures related substances that interfere with the analysis
Indication range	Range of values of the scale of the indicator tube, limited by the final and initial values of the scale
Lower (upper) limit	The smallest (greatest) value of the measured concentrations
Air intake device	Device for sucking air through indicator tubes

(Revised edition, Rev. No. 1).

APPLICATION 2
Reference

CHARACTERISTICS OF PRODUCED INDICATOR POWDERS FOR EQUIPMENT OF INDICATOR TUBES

Detected gas (steam)	Sucked air volume, cm 3	Measurement range, mg/m 3	Total air suction time, s	Gas (steam) captured by the filter cartridge	Gas (steam) interfering with the determination
nitrogen oxides					Halogens (chlorine, bromine, iodine), ozone in concentrations above 10 MPC
					Pairs of acids, alkalis and amines
					Pairs of acids, alkalis and amines
Sulfurous anhydride				Hydrogen sulfide, ammonia, nitrogen dioxide, sulfuric acid mist, water vapor
Sulfurous anhydride
Acetylene				Hydrogen sulfide, hydrogen phosphide, silicic hydrogen, ammonia, acetone and water vapours.
Acetylene
				Sulfurous anhydride, vapors of acetic acid, acetic anhydride, hydrochloric acid, in concentrations up to 10 MPC	Pairs of ketones and esters, vapors of acetic acid, acetic anhydride, hydrochloric acid and sulfurous anhydride in concentrations above 10 MPC
				Aromatic and unsaturated hydrocarbons, water vapor
	400´ 3		360´ 3	water vapor
				water vapor	Pairs of fatty and aromatic hydrocarbons
hydrogen sulfide					Mercaptans
				water vapor	Pairs of fatty and aromatic hydrocarbons
Petroleum hydrocarbons				Unsaturated and aromatic hydrocarbons, water vapor
Carbon oxide				Acetylene, ethylene, methane, a mixture of butane and propane, nitrogen oxides, chlorine, sulfur dioxide, hydrogen, gasoline vapors, benzene and its homologues, water, acetone, formic acid, formaldehyde, ethyl and methyl alcohols, dichloroethane, carbon disulfide	Pairs of metal carbonyls
					Vapors of bromine, iodine, oxidizing agents, chloramines
Ethyl ether				Vapors of water, ethyl alcohol, organic acids, phenol

(Revised edition, Rev. No. 1).

APPLICATION 3
Reference

RATED METROLOGICAL CHARACTERISTICS OF INDICATOR PIPES AND AIR INTAKE DEVICES TO THEM

1. Metrological characteristics

1.1. For linear-color indicator tubes, the following metrological characteristics are established:

nominal static conversion characteristic,

range of measured concentrations,

basic error,

relative error,

influence functions caused by a change in the influence quantity within operating conditions.

1.2. The characteristics of indicator tubes designed to determine the presence of a harmful substance in the air of the working area (colorimetric indicator tubes) are:

the nominal value of the concentration of a harmful substance that causes the appearance of an indication effect (trigger concentration);

operation error.

1.3. For air intake devices, the following metrological characteristics are established:

the amount of air sucked in,

error in dosing the volume of sucked-in air.

Instead of volume, it is allowed to normalize the duration of suction and the volume flow of air sucked through the indicator tube.

2. Methods of normalization and forms of presentation of metrological characteristics

2.1. The nominal static conversion characteristic is presented in the form of a formula or graph, which corresponds to the scale printed on the indicator tube, cassette or special label.

2.2. The range of measured concentrations is characterized by its lower and upper limits. The lower limit of the measurement range should be no more than 0.5 of the maximum allowable concentration, and the upper limit - at least 5 maximum allowable concentrations for a given substance.

It is allowed to divide the measurement range into several sub-ranges by changing the volume of air sucked through the indicator tube, setting the nominal value for each of these volumes. static characteristic transformations.

If the range of indications does not coincide with the measurement range, then the range of indications is normalized by setting the initial and final values of the scale.

2.3. The basic error of the indicator tubes is characterized by the limit of the permissible basic error. The values of the limit of permissible basic error must be selected from the series established in GOST 8.401-80.

At the development stages of indicator tubes, their main error is characterized by:

the limit of the permissible value of the systematic component of the basic error,

limit of the permissible value of the average standard deviation random component of the basic error.

2.4. The number of successively used indicator tubes, which ensures the reduction of the error in the result of measuring the concentration of a harmful substance to values not exceeding those specified in clause of this standard, is established in the regulatory documentation and should not exceed 5.

2.8. The regulatory documentation for specific indicator tubes includes data on impurities in the gas-air environment that interfere with the measurement of the concentration of this harmful substance. An impurity is considered non-interfering if, at an impurity concentration at a level of 5 maximum permissible values for it, the value of the basic error of the indicator tube is less than the established limit.

2.9. The regulatory documentation for indicator tubes must specify the storage conditions and the warranty period of storage, during which the error values of the indicator tubes are within the established limits.

The values of the warranty period of storage of indicator tubes are selected from row 1; 1.5; 2; 3 and 5 years old.

2.10. The volume of air sucked through the indicator tube by means of an air intake device is expressed in cm 3 .

The error in dosing the volume of sucked-in air is characterized by the limit of the permissible value and is selected from a range of 5, 3, 2, 1 and 0.5%.

An air sampling device intended for use with an indicator tube must have the same flow characteristics as the air sampling device used for calibrating the indicator tube.

Name:

System of labor safety standards. Work area air. Method for measuring concentrations of harmful substances with indicator tubes

Active

Introduction date:

Cancellation date:

Replaced with:

Text GOST 12.1.014-84 Occupational safety standards system. Work area air. Method for measuring concentrations of harmful substances with indicator tubes

GOST 12.1.014-84

INTERSTATE STANDARD

SYSTEM OF WORK SAFETY STANDARDS

AIR of the working area

METHOD FOR MEASURING CONCENTRATIONS OF HARMFUL SUBSTANCES

INDICATOR PIPES

Official edition

Standartinform

UDC 614.71:543.27:006.354

Group T58

INTERSTATE STANDARD

Occupational safety standards system

WORK AREA AIR

Method for measuring concentrations of harmful substances with indicator tubes

Occupational safety standards system. GOST 12.1.014-79

Air in the zone of operation. Method of measuring unhealthy matters concentration using indicator tubes

MKC 13.040.30 OKSTU 0012

Decree of the USSR State Committee for Standards of December 14, 1984 No. 4362 established the introduction date

01.01.86

The validity period was removed according to protocol No. 5-94 of the Interstate Council for Standardization, Metrology and Certification (IUS 11-12-94)

The terms used in the standard and their explanations are given in Appendix 1.

Characteristics of the produced indicator powders are given in Appendix 2.

Standardized metrological characteristics of indicator tubes and air intake devices for them are given in Appendix 3.

1. EQUIPMENT

1.1. Indicator tubes, including those supplied by the consumer using special sets with indicator powders.

1.2. Filter tubes, including those supplied by the consumer using special kits.

1.3. An air intake device (such as a pump, bellows, etc.) designed for use with this indicator tube.

2. PREPARATION FOR MEASUREMENT

2.1. Preparation of equipment for measuring the concentration of harmful substances in the air of the working area is carried out in accordance with the regulatory and technical documentation for indicator and filter tubes and the air intake device intended for them.

Official publication Reprint prohibited

Edition (October 2010) with Revision No. 1 approved March 1990

the use of indicator tubes for planned or operational control. Regardless of the composition of the air in the working area, the use of filter tubes with indicator tubes, if it is provided for in the regulatory and technical documentation for indicator tubes, is mandatory in order to avoid violating the operating conditions of indicator tubes.

2.1, 2.2. (Revised edition, Rev. No. 1).

3. MEASURING

3.1. Measurement of concentrations of harmful substances in the air of the working area is carried out with the following parameters:

barometric pressure - from 90 to 104 kPa (680-780 mm Hg);

relative humidity - 30-80%;

temperature - from 288 to 303 K.

Deviation from the specified parameters is allowed, if it is provided for in the regulatory and technical documentation for measuring instruments.

The control of meteorological parameters of the air in the working area should be carried out in parallel with the measurements of the concentrations of harmful substances with indicator tubes.

3.2. An indicator tube is attached to the air intake device, designed to measure the concentration of a harmful substance, and filter tubes, if they are provided for by regulatory and technical documentation.

The measurement should be started no later than 1 min after the depressurization of the tubes.

3.1, 3.2. (Revised edition, Rev. No. 1).

3.3. The amount of air sucked through the indicator tubes is set in accordance with the normative and technical documentation for these tubes.

3.4. Measurement of concentrations of harmful substances is carried out sequentially under production conditions in accordance with GOST 12.1.005-88. In this case, the number of indicator tubes specified in the relevant regulatory and technical documentation is used.

3.5. The concentration of a harmful substance in mg / m 3 in the air of the working area is measured by the length or intensity of the indicator powder layer that has changed its initial color using a scale printed on the indicator tube, cassette or special label. The measurement result is taken as the arithmetic mean of successive observations, as indicated in paragraph 3.4.

3.6. When the interface between the colors of the layers of the initial and reacted indicator powder is blurred, the concentration of the measured harmful substance on the scale is measured along the lower and upper parts of the boundary. The average value is taken as the measurement result.

3.7. The result of measuring the concentration of a harmful substance is brought to normal conditions (C n): temperature 293 K, atmospheric pressure 101.3 kPa (760 mm Hg), relative humidity 60%.

The concentration (C n) under normal conditions in mg / m 3 is calculated by the formula

C n C|,f, r

(273 + 0-101.3 293 r

where C v f,/; - the result of measuring the concentration of a harmful substance, at ambient temperature t ° C, relative humidity f % and atmospheric pressure p kPa, mg / m 3;

K in - coefficient taking into account the influence of ambient temperature and humidity on the readings of indicator tubes, the value of which is determined in accordance with paragraph 2.5 of Appendix 3.

The relative measurement error (b) should not exceed +35% in the range up to 2.0 maximum allowable concentrations (MPC) inclusive and +25% at concentrations above 2.0 MPC under the conditions specified in clause 3.1.

The measurement result is presented as: (C n + A) mg/m 3 with a confidence level of 0.95.

The absolute error (A) is calculated by the formula

In the range up to 1.0 MAC, inclusive, an increase in the error up to + 60% is allowed. This value of the relative error must be indicated in the regulatory and technical documentation for measuring instruments.

(Revised edition, Rev. No. 1).

4. SAFETY REQUIREMENTS

4.1. When measuring the concentration of harmful substances with indicator tubes in the air of the working area, the safety standards and rules in force in this production should be observed.

4.3. When opening the tubes, it is necessary to observe all safety precautions when working with glass, using special devices and protective equipment.

APPENDIX 1 Reference

TERMS USED IN THE STANDARD AND THEIR EXPLANATIONS

Work zone

Method for measuring the concentration of harmful substances Harmful substance Maximum permissible

concentration of harmful substances in the air of the working area

According to GOST 12.1.005-88 According to RMG 29-99

According to GOST 12.1.007-76 According to GOST 12.1.005-88

Explanation

indicator tube

Linear color tube

Primary measuring transducer, structurally representing a glass tube filled with granular filler (indicator powder)

An indicator tube that allows you to measure the concentration of a harmful substance in the analyzed air sucked through the tube along the length of the indicator powder layer in the tube that has changed its initial color

Colorimetric indicator tube

An indicator tube that makes it possible to judge the presence of a harmful substance in the analyzed air sucked through the tube at a concentration higher than the triggering concentration for this indicator tube by the color intensity of the indicator powder by comparing it with a control sample of the indicator effect

filter tube

A glass tube filled with one or more absorbers used to trap gases and vapors that interfere with the measurement of a harmful substance

indicator powder

A granular chemisorbent that changes color when a directly detectable harmful substance or its volatile products of interaction with a chemisorbent in a filter tube passes through it

Absorber

A granular sorbent or chemisorbent that completely passes the harmful substance to be determined and captures related substances that interfere with the analysis

Indication range

Range of values of the scale of the indicator tube, limited by the final and initial values of the scale

Lower (upper) limit Air intake device

The lowest (highest) value of measured concentrations Device for sucking air through indicator tubes

APPENDIX 2 Reference

CHARACTERISTICS OF PRODUCED INDICATOR POWDERS FOR EQUIPMENT OF INDICATOR TUBES

Detected gas (steam)	Sucked air volume, cm 3	Range measurement,	Total air suction time, s	Gas (steam) captured by the filter cartridge	Gas (steam) interfering with the determination
nitrogen oxides					Halogens (chlorine, bromine, iodine), ozone in concentrations above 10 MPC
					Pairs of acids, alkalis

Serum anhydride				hydrogen sulfide, ammonia,
				nitrogen dioxide, sulfuric acid mist, water vapor
Acetylene				Hydrogen sulfide, phospho-
				Hydrogen hydrate, silicic hydrogen, ammonia, acetone and water vapours.
				Sulfurous anhydride,	Pairs of ketones and complex
				vapors of acetic acid,	ethers, a pair of vinegar-
				acetic anhydride, salt-	noic acid, acetic
				noic acid in concentrated	anhydride, hydrochloric acid
				up to 10 MPC	lots and anhydride series-
					in concentrations above 10 MPC
				Aromatic and unsaturated hydrocarbons, water vapor
				water vapor	Vapors of hydrocarbons

				water vapor	Vapors of hydrocarbons
					fatty and aromatic series
hydrogen sulfide					Mercaptans
				water vapor	Vapors of hydrocarbons
					fatty and aromatic series
hydrocarbons				Hydrocarbons
				sensible and aromatic, water vapor
Carbon ok-				Acetylene, ethylene, methane,	Pairs of carbonyls me-
				mixture of butane and propane,
				nitrogen oxides, chlorine, sulfurous anhydride, hydrogen, vapors of gasoline, benzene and
				its homologues, water, acetone, formic acid, formaldehyde, ethyl and methyl alcohols, dichloroethane, carbon disulfide
					Vapors of bromine, iodine, oxidizing agents, chloramines
Ethyl				Vapors of water, ethyl
				alcohol, organic acids, phenol

APPENDICES 1, 2. (Changed edition, Amendment No. 1).

APPENDIX 3

Mandatory

RATED METROLOGICAL CHARACTERISTICS OF INDICATOR PIPES AND AIR INTAKE DEVICES TO THEM

1. Metrological characteristics

1.1. For linear-color indicator tubes, the following metrological characteristics are established:

nominal static conversion characteristic, range of measured concentrations, basic error, relative error,

influence functions caused by a change in the influence quantity within operating conditions.

1.2. The characteristics of indicator tubes designed to determine the presence of a harmful substance in the air of the working area (colorimetric indicator tubes) are:

the nominal value of the concentration of a harmful substance that causes the appearance of an indication effect (trigger concentration); operation error.

1.3. For air intake devices, the following metrological characteristics are established: the volume of air sucked in,

error in dosing the volume of sucked-in air.

Instead of volume, it is allowed to normalize the duration of suction and the volume flow of air sucked through the indicator tube.

2. Methods of normalization and forms of presentation of metrological characteristics

2.1. The nominal static conversion characteristic is presented in the form of a formula or graph, which corresponds to the scale printed on the indicator tube, cassette or special label.

It is allowed to divide the measurement range into several sub-ranges by changing the volume of air sucked through the indicator tube, setting the nominal static conversion characteristic for each of these volumes.

If the range of indications does not coincide with the measurement range, then the range of indications is normalized by setting the initial and final values of the scale.

At the stages of development of indicator tubes, their main error is characterized by: the limit of the permissible value of the systematic component of the main error, the limit of the permissible value of the standard deviation of the random component of the main error.

2.4. The number of successively used indicator tubes, which ensures the reduction of the error in the result of measuring the concentration of a harmful substance to values not exceeding those specified in and. 3.7 of this standard, set in the regulatory and technical documentation and should be no more than 5.

2.5. The influence function is normalized in the form of a graph or table and takes into account the effect on the readings of the indicator tube of joint changes in temperature and relative humidity of the ambient air within the conditions specified in and. 3.1 of this standard.

The influence function is not normalized if the additional error is within the conditions specified in and. 3.1 of this standard does not exceed 20% of the maximum permissible basic error.

2.6. The nominal value of the concentration of a harmful substance that causes the appearance of an indication effect in colorimetric indicator tubes (trigger concentration) is expressed in mg/m 3 .

2.7. The error of the colorimetric indicator tube is characterized by the limit of the permissible relative error of the response concentration. The values of the limit of permissible basic error must be selected from the series established in GOST 8.401-80.

2.8. The regulatory and technical documentation for specific indicator tubes includes data on impurities in the gas-air environment that interfere with the measurement of the concentration of this harmful substance. An impurity is considered non-interfering if, at an impurity concentration at a level of 5 maximum permissible values for it, the value of the basic error of the indicator tube is less than the established limit.

2.9. The regulatory and technical documentation for the indicator tubes must specify the storage conditions and the guaranteed storage period, during which the error values of the indicator tubes are within the established limits.

The values of the warranty period of storage of indicator tubes are selected from row 1; 1.5; 2; 3 and 5 years old.

2.10. The volume of air sucked through the indicator tube by means of an air intake device is expressed in cm 3 .

The error in dosing the volume of sucked-in air is characterized by the limit of the permissible value and is selected from a range of 5, 3, 2, 1 and 0.5%.

An air sampling device intended for use with an indicator tube must have the same flow characteristics as the air sampling device used for calibrating the indicator tube.

Editor M.I. Maksimova Technical editor N.S. Grishanova Proofreader V.E. Nesterova Computer layout L.A. Circular

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GOST R ISO 17736-2013 Working area air. Determination of isocyanates in air using a dual filter sampler and high performance liquid chromatography
GOST R ISO 21438-2-2012 Working area air. Determination of inorganic acids by ion chromatography. Part 2: Volatile acids other than hydrofluoric (hydrochloric, hydrobromic and nitric acids)
GOST R ISO 21438-3-2012 Working area air. Determination of inorganic acids by ion chromatography. Part 3: Hydrofluoric acid and solid fluorides
GOST 32531-2013 Benzidine. Measurement of benzidine concentration in water using liquid-liquid extraction or solid-phase extraction and reverse-phase high-performance liquid chromatography/particle beam interface/mass spectrometry
GOST R 56640-2015 Clean rooms. Design and installation. General requirements
GOST R ISO 14382-2015 Working area air. Determination of toluene diisocyanate vapors using glass fiber filters impregnated with 1-(2-pyridyl)-piperazine and analysis by high performance liquid chromatography with ultraviolet and fluorescent detectors
GOST R ISO 16000-26-2015 Air of enclosed spaces. Part 26: Sampling for determination of carbon dioxide (CO2) content
GOST R ISO 28439-2015 Working area air. Characteristics of ultrafine aerosols and nanoaerosols. Determination of particle size distribution and number concentration of particles using differential electrical mobility analysis systems
GOST 32596-2013 Benzidine. Measurement of the concentration of benzidine in water by gas chromatography - mass spectrometry
GOST R 55175-2012 Mine atmosphere. Dust Control Methods
GOST R 56638-2015 Clean rooms. Ventilation and air conditioning. General requirements
GOST R ISO 16000-28-2015 Air of enclosed spaces. Part 28: Determination of odor emissions from building materials using test chambers
GOST 31824-2012 Fibrous mist eliminators. Types and basic parameters. Safety requirements. Test Methods
GOST 31830-2012 Electrostatic precipitators. Safety requirements and test methods
GOST 31831-2012 Centrifugal dust collectors. Safety requirements and test methods
GOST R 54578-2011 Working area air. Aerosols are predominantly fibrogenic. General principles for hygiene control and exposure assessment
GOST R 54597-2011 Working area air. Ultrafine aerosols, aerosols of nanoparticles and nanostructured particles. Characterization and inhalation exposure assessment
GOST R ISO 11614-2011 Compression ignition piston internal combustion engines. A device for measuring smoke and determining the coefficient of absorption of light flux in exhaust gases
GOST R ISO 16000-12-2011 Air of enclosed spaces. Part 12: Sampling of polychlorinated biphenyls (PCBs), polychlorinated dibenzo-para-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and polycyclic aromatic hydrocarbons (PAHs)
GOST R ISO 16000-7-2011 Air of enclosed spaces. Part 7: Sampling for determination of asbestos fiber content
GOST R ISO 16000-8-2011 Air of enclosed spaces. Part 8. Determining the local average "age" of air in buildings to assess ventilation conditions
GOST R ISO 16362-2009 Atmospheric air. Determination of the content of polycyclic aromatic hydrocarbons in the form of solid particles by high performance liquid chromatography
GOST R ISO 21438-1-2011 Working area air. Determination of inorganic acids by ion chromatography. Part 1. Non-volatile acids (sulfuric and phosphoric)
GOST R ISO 14644-6-2010 Clean rooms and associated controlled environments. Part 6. Terms
GOST 33554-2015 Automobile vehicles. The content of pollutants in the air of the driver's cabin and the passenger room. Technical requirements and test methods
GOST 33670-2015 Single motor vehicles. Examination and test methods for conformity assessment
GOST R 53562-2009 Working area air. Basic provisions for the choice of sampling and analysis methods for the content of isocyanates in the air
GOST R ISO 12884-2007 Atmospheric air. Determination of the total content of polycyclic aromatic hydrocarbons (in the gaseous state and in the form of suspended solids). Sampling for the filter and sorbent with subsequent analysis by chromato-mass spectrometry
GOST R ISO 14644-3-2007 Clean rooms and associated controlled environments. Part 3. Test methods
GOST R ISO 14644-7-2007 Clean rooms and associated controlled environments. Part 7: Isolation devices (clean air shelters, glove boxes, isolators and mini-environments)
GOST R ISO 14965-2008 Air quality. Determination of non-methane organic compounds. Method of preliminary cryogenic concentration and direct determination using a flame ionization detector
GOST R ISO 15202-3-2008 Working area air. Determination of metals and metalloids in solid aerosol particles by inductively coupled plasma atomic emission spectrometry. Part 3. Analysis
GOST R ISO 16000-1-2007 Air of enclosed spaces. Part 1. Sampling. General provisions
GOST R ISO 16000-10-2009 Air of enclosed spaces. Part 10. Determination of the emission of volatile organic compounds from building and finishing materials. Test cell method
GOST R ISO 16000-11-2009 Air of enclosed spaces. Part 11. Determination of the emission of volatile organic compounds from building and finishing materials. Selection, storage and preparation of samples for testing
GOST R ISO 16000-3-2007 Indoor air. Part 3. Determination of the content of formaldehyde and other carbonyl compounds. Active sampling method
GOST R ISO 16000-5-2009 Air of enclosed spaces. Part 5: Sampling of volatile organic compounds (VOCs)
GOST R ISO 16000-6-2007 Indoor air. Part 6. Determination of volatiles organic compounds in the air of enclosed spaces and the test chamber by active sampling for Tenax TA sorbent followed by thermal desorption and gas chromatographic analysis using MSD/FID
GOST R ISO 16000-9-2009 Air of enclosed spaces. Part 9. Determination of the emission of volatile organic compounds from building and finishing materials. Test chamber method
GOST R ISO 16017-2-2007 Atmospheric air, working area and enclosed spaces. Sampling of volatile organic compounds using a sorption tube followed by thermal desorption and gas chromatographic analysis on capillary columns. Part 2: Diffusion sampling method
GOST R ISO 16107-2009 Working area air. Performance evaluation of diffusion samplers
GOST R ISO 16200-1-2007 Work area air quality. Sampling of volatile organic compounds followed by solvent desorption and gas chromatographic analysis. Part 1. Sampling by pumping method
GOST R ISO 16200-2-2007 Work area air quality. Sampling of volatile organic compounds followed by solvent desorption and gas chromatographic analysis. Part 2: Diffusion sampling method
GOST R ISO 16702-2008 Work area air quality. Determination of the total content of isocyanate groups of organic compounds in the air by liquid chromatography using 1-(2-methoxy-phenyl) piperazine
GOST R ISO 17734-1-2009 Analysis of organonitrogen compounds in air by liquid chromatography and mass spectrometry. Part 1. Determination of isocyanates by their dibutylamine derivatives
GOST R ISO 17734-2-2009 Analysis of organonitrogen compounds in air by liquid chromatography and mass spectrometry. Part 2. Determination of amines and aminoisocyanates by their dibutylamine and ethyl chloroformate derivatives
GOST R ISO 8178-5-2009 Reciprocating internal combustion engines. Measurement of emissions of harmful substances. Part 5. Fuels for testing
GOST R ISO 9359-2007 Air quality. Stratified sampling method for air quality assessment
GOST R 57256-2016 Air of enclosed spaces. Sampling in the determination of ammonia
GOST R ISO 11771-2016 Air quality. Determination of time-averaged mass emissions and emission factors. General Approach
GOST R ISO 13137-2016 Working area air. Pumps for individual sampling of chemical and biological substances. Requirements and test methods
GOST R ISO 17091-2016 Working area air. Determination of the content of lithium hydroxide, sodium hydroxide, potassium hydroxide and calcium dihydroxide. Method based on the measurement of the respective cations by ion suppression chromatography
GOST ISO 16000-21-2016 Indoor air. Part 21. Detection and enumeration of molds. Material sampling
GOST ISO 16000-3-2016 Indoor air. Part 3. Determination of formaldehyde and other carbonyl compounds in indoor air and in test chamber air. Active sampling method
GOST ISO 16000-4-2016 Indoor air. Part 4. Determination of formaldehyde. Diffusion sampling method
GOST ISO 16000-6-2016 Indoor air. Part 6: Determination of volatile organic compounds in indoor and test chamber air by active sampling for Tenax TA sorbent followed by thermal desorption and gas chromatography analysis using MSD/FID
GOST R 57669-2017 Working area air. Devices for sampling bioaerosol volumetric samples. Requirements and test methods
GOST R ISO 12219-5-2017 Air of the internal space of motor vehicles. Part 5: Screening for VOC emissions from interior trim and interior materials. Static method using a test chamber
GOST R ISO 16258-1-2017 Working area air. Analysis of inhaled crystalline silicon by X-ray diffraction. Part 1. Method of direct measurement using a filter
GOST R ISO 17734-1-2017 Analysis of organonitrogen compounds in air by liquid chromatography and mass spectrometry. Part 1. Determination of isocyanates by their dibutylamine derivatives
GOST R ISO 17734-2-2017 Analysis of organonitrogen compounds in air by liquid chromatography and mass spectrometry. Part 2. Determination of amines and aminoisocyanates by their dibutylamine and ethyl chloroformate derivatives
GOST R ISO 30011-2017 Working area air. Determination of the content of metals and metalloids in solid aerosol particles by inductively coupled plasma mass spectrometry
GOST R ISO 14644-1-2017 Clean rooms and associated controlled environments. Part 1. Classification of air purity by particle concentration
GOST R ISO 8178-5-2017 Reciprocating internal combustion engines. Measurement of emissions of combustion products. Part 5. Fuel for testing
GOST ISO 16000-20-2017 Indoor air. Part 20. Detection and enumeration of molds. Determination of the total number of disputes
GOST ISO 16000-27-2017 Indoor air. Part 27: Determination of the presence of settled fibrous dust on surfaces using SEM (Scanning Electron Microscope) (direct method)
GOST ISO 16000-29-2017 Indoor air. Part 29: Test methods for VOC detectors
GOST ISO 16000-30-2017 Indoor air. Part 30. Organoleptic analysis of indoor air
GOST ISO 16000-32-2017 Indoor air. Part 32. Evaluation of buildings for the presence of pollutants
GOST ISO 14644-1-2002 Clean rooms and associated controlled environments. Part 1. Classification of air purity
GOST ISO 14698-1-2005 Clean rooms and associated controlled environments. Biocontamination control. Part 1. General principles and methods
GOST ISO 14698-2-2005 Clean rooms and associated controlled environments. Biocontamination control. Part 2. Analysis of data on biocontaminants
GOST R EN 13205-2010 Working area air. Evaluation of the performance of instruments for the determination of particulate matter
GOST R EN 13528-1-2010 Atmospheric air quality. Diffusion samplers used in the determination of the content of gases and vapors. Requirements and test methods. Part 1. General requirements
GOST R EN 13528-2-2010 Atmospheric air quality. Diffusion samplers used in the determination of the content of gases and vapors. Requirements and test methods. Part 2: Special requirements and test methods
GOST R EN 13528-3-2010 Atmospheric air quality. Diffusion samplers used in the determination of the content of gases and vapors. Requirements and test methods. Part 3. Selection, use and maintenance guide
GOST R EN 1822-2-2012 EPA, HEPA and ULPA high-performance air purification filters. Part 2: Aerosol generation, test equipment, particle counting statistics
GOST R EN 1822-3-2012 EPA, HEPA and ULPA high-performance air purification filters. Part 3: Flat filter material tests
GOST R EN 1822-4-2012 EPA, HEPA and ULPA high-performance air purification filters. Part 4: Filter Leakage Tests (Scan Method)
GOST R EN 1822-5-2014 EPA, HEPA and ULPA high-performance air purification filters. Part 5. Determining the efficiency of filter elements
GOST R EN 482-2012 Working area air. General requirements for the characteristics of methods for measuring the content of chemicals

Working area air

Method for measuring concentrations of harmful substances

indicator tubes

GOST 12.1.014-84

STATE STANDARD OF THE UNION OF THE SSR

Occupational safety standards system

Working area air

Method for measuring concentrations of harmful substances GOST

indicator tubes 12.1.014-84

Occupational safety standards system. Air of Instead

the work zone. Method of measuring GOST 12.1.014-79

unhealthy matters concentration using

Introduction date 1986-01-01

APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Standards dated December 14, 1984 No. 4362

INSTEAD OF GOST 12.1.014-79

The validity period was removed by decision of the Interstate Council for Standardization, Metrology and Certification (Minutes No. 5-94)

REPUBLICATION (January 1996) with Amendment No. 1 approved in March 1990 (IUS 7-90)

The terms used in the standard and their explanations are given in Appendix 1.

Characteristics of the produced indicator powders are given in Appendix 2.

Standardized metrological characteristics of indicator tubes and air intake devices for them are given in Appendix 3.

1. Hardware

1.1. Indicator tubes, including those supplied by the consumer using special sets with indicator powders.

1.2. Filter tubes, including those supplied by the consumer using special kits.

1.3. An air intake device (such as a pump, bellows, etc.) designed for use with this indicator tube.

2. Preparation for measurement

2.1. Preparation of equipment for measuring the concentration of harmful substances in the air of the working area is carried out in accordance with the regulatory documentation for indicator and filter tubes and the air intake device intended for them.

2.2. In unexplored production conditions, before taking measurements with indicator tubes, it is necessary to conduct a one-time qualitative assessment of the composition of the air in the working area using certified methods or guidelines approved by the USSR Ministry of Health. Based on the data obtained, the possibility of using indicator tubes for planned or operational control is established. Regardless of the composition of the air in the working area, the use of filter tubes with indicator tubes, if it is provided for in the regulatory documentation for indicator tubes, is mandatory in order to avoid violating the operating conditions of indicator tubes.

2.1, 2.2 (Revised edition, Rev. No. 1).

3. Taking a measurement

3.1. Measurement of concentrations of harmful substances in the air of the working area is carried out with the following parameters:

barometric pressure - from 90 to 104 kPa (680-780 mm Hg);

relative humidity - 30-80%;

temperature - from 288 to 303 K.

Deviation from the specified parameters is allowed, if it is provided for in the regulatory and technical documentation for measuring instruments.

Control of the metrological parameters of the air in the working area should be carried out in parallel with measurements of the concentrations of harmful substances with indicator tubes.

3.2. An indicator tube is attached to the air intake device, designed to measure the concentration of a harmful substance, and filter tubes, if they are provided for by regulatory documentation.

The measurement should be started no later than 1 min after the depressurization of the tubes.

3.1, 3.2 (Revised edition, Rev. No. 1).

3.3. The amount of air sucked through the indicator tubes is set in accordance with the regulatory documentation for these tubes.

3.7 The result of measuring the concentration of a harmful substance is brought to normal conditions ( C n): temperature 293 K, atmospheric pressure 101.3 kPa (760 mm Hg), relative humidity 60%.

concentration ( C n) under normal conditions in mg / m 3 is calculated by the formula

where is the result of measuring the concentration of a harmful substance, at ambient temperature, t°С, relative humidity

- % and atmospheric pressure kPa, mg/m 3 ;

Coefficient that takes into account the effect of ambient temperature and humidity on the readings of indicator tubes, the value of which is determined in accordance with paragraph 2.5 of Appendix 3.

The relative measurement error should not exceed ± 35% in the range up to 2.0 maximum allowable concentrations (MPC) inclusive and ± 25% at concentrations above 2.0 MPC under the conditions specified in clause 3.1.

The measurement result is presented as: mg/m 3 with a confidence level of 0.95.

The value of the absolute error D calculated according to the formula

In the range up to and including 1.0 MPC, an increase in the error up to ± 60% is allowed. This value of the relative error must be indicated in the regulatory and technical documentation for measuring instruments.

(Revised edition, Rev. No. 1).

4. Safety requirements

4.1. When measuring the concentration of harmful substances with indicator tubes in the air of the working area, the safety standards and rules in force in this production should be observed.

4.3. When opening the tubes, it is necessary to observe all safety precautions when working with glass, using special devices and protective equipment.

Appendix 1
(reference)

Terms used in the standard and their explanations

Term	Explanation
Work zone	According to GOST 12.1.005-88
Method for measuring the concentration of harmful substances	According to GOST 16263-70
harmful substance	According to GOST 12.1.007-76
Maximum permissible concentrations of harmful substances in the air of the working area	According to GOST 12.1.005-88
indicator tube	Primary measuring transducer, structurally representing a glass tube filled with granular filler (indicator powder)
Linear color indicator tube	An indicator tube that allows you to measure the concentration of a harmful substance in the analyzed air sucked through the tube along the length of the indicator powder layer in the tube that has changed its initial color
Colorimetric indicator tube	An indicator tube that makes it possible to judge the presence of a harmful substance in the analyzed air sucked through the tube at a concentration higher than the triggering concentration for this indicator tube by the color intensity of the indicator powder by comparing it with a control sample of the indicator effect
filter tube	A glass tube filled with one or more absorbers used to trap gases and vapors that interfere with the measurement of a harmful substance
indicator powder	A granular chemisorbent that changes color when a directly detectable harmful substance or its volatile products of interaction with a chemisorbent in a filter tube passes through it
Absorber	A granular sorbent or chemisorbent that completely passes the harmful substance to be determined and captures related substances that interfere with the analysis
Indication range	Range of values of the scale of the indicator tube, limited by the final and initial values of the scale
Lower (upper) limit	The smallest (greatest) value of the measured concentrations
Air intake device	Device for sucking air through indicator tubes

(Changed edition, Rev. No. 1)

Annex 2
(reference)

Characteristics of the produced indicator powders for equipping indicator tubes

Detected gas (steam)	Sucked air volume, cm 3	Measurement range, mg/m 3	Total air suction time, s	Gas (steam) captured by the filter cartridge	Gas (steam) interfering with the determination
nitrogen oxides		2,5-50			Halogens (chlorine, bromine, iodine), ozone in concentrations above 10 MPC
Ammonia		2,5-30			Vapors of acids
		20-100			alkalis and amines
Anhydride		5-30		hydrogen sulfide,
sulfur		20-120		ammonia, nitrogen dioxide, sulfuric acid mist, water vapor
Acetylene		50-1400		Hydrogen sulfide, phosphorous
		1000-3000		hydrogen, silicic hydrogen, ammonia, acetone and water vapours.
Acetone		100-2000		Sulfurous anhydride, vapors of acetic acid, acetic anhydride, hydrochloric acid, in concentrations up to 10 MPC	Pairs of ketones and esters, pairs of acetic acid, acetic anhydride, hydrochloric acid and sulfurous anhydride in concentrations above 10 MPC
Petrol		50-1000		Aromatic and unsaturated hydrocarbons, water vapor
Benzene	400 ´ 3	2-25	360 ´ 3	water vapor
xylene		25-500		water vapor	Pairs of fatty and aromatic hydrocarbons
hydrogen sulfide		5-30			Mercaptans
Toluene		25-500		water vapor	Pairs of fatty and aromatic hydrocarbons
Petroleum hydrocarbons		100-1500		Unsaturated and aromatic hydrocarbons, water vapor
Carbon oxide		5-120		Acetylene, ethylene, methane, a mixture of butane and propane, nitrogen oxides, chlorine, sulfur dioxide, hydrogen, gasoline vapors, benzene and its homologues, water, acetone, formic acid, formaldehyde, ethyl and methyl alcohols, dichloroethane, carbon disulfide	Pairs of metal carbonyls
Chlorine		0,15-15			Vapors of bromine, iodine, oxidizing agents, chloramines
Ethyl ether		100-3000		Vapors of water, ethyl alcohol, organic acids, phenol

(Revised edition, Rev. No. 1).

Annex 3
(reference)

Normalized metrological characteristics of indicator tubes and air intake devices for them

1. Metrological characteristics

1.1. For linear-color indicator tubes, the following metrological characteristics are established:

nominal static conversion characteristic,

range of measured concentrations,

basic error,

relative error,

influence functions caused by a change in the influence quantity within operating conditions.

1.2. The characteristics of indicator tubes designed to determine the presence of a harmful substance in the air of the working area (colorimetric indicator tubes) are:

the nominal value of the concentration of a harmful substance that causes the appearance of an indication effect (trigger concentration);

operation error.

1.3. For air intake devices, the following metrological characteristics are established:

the amount of air sucked in,

error in dosing the volume of sucked-in air.

Instead of volume, it is allowed to normalize the duration of suction and the volume flow of air sucked through the indicator tube.

2. Methods of normalization and forms of presentation of metrological characteristics

2.1. The nominal static conversion characteristic is presented in the form of a formula or graph, which corresponds to the scale printed on the indicator tube, cassette or special label.

If the range of indications does not coincide with the measurement range, then the range of indications is normalized by setting the initial and final values of the scale.

At the development stages of indicator tubes, their main error is characterized by:

the limit of the permissible value of the systematic component of the basic error,

the limit of the permissible value of the standard deviation of the random component of the basic error.

2.4. The number of successively used indicator tubes, which ensures the reduction of the error in the result of measuring the concentration of a harmful substance to values not exceeding those specified in clause 3.7 of this standard, is established in the regulatory documentation and should not exceed 5.

The influence function is not standardized if the additional error within the conditions specified in 3.1 of this standard does not exceed 20% of the maximum permissible basic error.

2.6. The nominal value of the concentration of a harmful substance that causes the appearance of an indication effect in colorimetric indicator tubes (trigger concentration) is expressed in mg/m 3 .

The values of the warranty period of storage of indicator tubes are selected from row 1; 1.5; 2; 3 and 5 years old.

2.10. The volume of air sucked through the indicator tube by means of an air intake device is expressed in cm 3 .

The error in dosing the volume of sucked-in air is characterized by the limit of the permissible value and is selected from a range of 5, 3, 2, 1 and 0.5%.

An air sampling device intended for use with an indicator tube must have the same flow characteristics as the air sampling device used for calibrating the indicator tube.

STATE STANDARD OF THE UNION OF THE SSR

Occupational safety standards system

Working area air

Method for measuring concentrations of harmful substances
indicator tubes

GOST 12.1.014-84

MOSCOW

APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Standards dated December 14, 1984 No. 4362

INSTEAD OF GOST 12.1.014-79

The validity period was removed by decision of the Interstate Council for Standardization, Metrology and Certification (Minutes No. 5-94)

REPUBLICATION (January 1996) with Amendment No. 1 approved in March 1990 (IUS 7-90)

The terms used in the standard and their explanations are given in the appendix.

Characteristics of the produced indicator powders are given in the appendix.

The normalized metrological characteristics of indicator tubes and air intake devices for them are given in the appendix.

STATE STANDARD OF THE UNION OF THE SSR

Occupational safety standards system

Working area air

Method for measuring concentrations of harmful substances

indicatortubes

Occupational safety standards system.
Air of the work zone. Method of measuring unhealthy matters
concentration using indicator tubes

GOST
12.1.014-84

Instead
GOST 12.1.014-79

Introduction date 1986-01-01

1. EQUIPMENT

1.1. Indicator tubes, including those supplied by the consumer using special sets with indicator powders.

1.2. Filter tubes, including those supplied by the consumer using special kits.

1.3. An air intake device (such as a pump, bellows, etc.) designed for use with this indicator tube.

2. PREPARATION FOR MEASUREMENT

2.1, 2.2 (Revised edition, Rev. No. 1).

3. MEASURING

barometric pressure - from 90 to 104 kPa (680-780 mm Hg);

relative humidity - 30 - 80%;

temperature - from 288 to 303 K.

Deviation from the specified parameters is allowed, if it is provided for in the regulatory and technical documentation for measuring instruments.

Control of the metrological parameters of the air in the working area should be carried out in parallel with measurements of the concentrations of harmful substances with indicator tubes.

3.2. An indicator tube is attached to the air intake device, designed to measure the concentration of a harmful substance, and filter tubes, if they are provided for by regulatory documentation.

The measurement should be started no later than 1 min after the depressurization of the tubes.

3.1, 3.2 (Revised edition, Rev. No. 1).

3.3. The amount of air sucked through the indicator tubes is set in accordance with the regulatory documentation for these tubes.

concentration ( With m) under normal conditions in mg/m3 is calculated by the formula

where is the result of measuring the concentration of a harmful substance, at ambient temperature, t°C, relative humidity φ% and atmospheric pressure R kPa, mg/m3;

K B - coefficient that takes into account the influence of temperature and humidity of the surrounding air on the readings of indicator tubes, the value of which is determined in accordance with paragraph of the application.

The measurement result is presented as: ( With H ± Δ) mg/m3 with a confidence level of 0.95.

The value of the absolute error D is calculated by the formula

In the range up to 1.0 MPC, the error may increase up to ±60%. This value of the relative error must be indicated in the regulatory and technical documentation for measuring instruments.

(Revised edition, Rev. No. 1).

4. SAFETY REQUIREMENTS

4.1. When measuring the concentration of harmful substances with indicator tubes in the air of the working area, the safety standards and rules in force in this production should be observed.

4.3. When opening the tubes, it is necessary to observe all safety precautions when working with glass, using special devices and protective equipment.

APPLICATION 1
Reference

TERMS USED IN THE STANDARD AND THEIR EXPLANATIONS

	Explanation
Work zone
Method for measuring the concentration of harmful substances	According to GOST 16263-70
harmful substance
Maximum permissible concentrations of harmful substances in the air of the working area
indicator tube	Primary measuring transducer, structurally representing a glass tube filled with granular filler (indicator powder)
Linear color indicator tube	An indicator tube that allows you to measure the concentration of a harmful substance in the analyzed air sucked through the tube along the length of the indicator powder layer in the tube that has changed its initial color
Colorimetric indicator tube	An indicator tube that makes it possible to judge the presence of a harmful substance in the analyzed air sucked through the tube at a concentration higher than the triggering concentration for this indicator tube by the color intensity of the indicator powder by comparing it with a control sample of the indicator effect
filter tube	A glass tube filled with one or more absorbers used to trap gases and vapors that interfere with the measurement of a harmful substance
indicator powder	A granular chemisorbent that changes color when a directly detectable harmful substance or its volatile products of interaction with a chemisorbent in a filter tube passes through it
Absorber	A granular sorbent or chemisorbent that completely passes the harmful substance to be determined and captures related substances that interfere with the analysis
Indication range	Range of values of the scale of the indicator tube, limited by the final and initial values of the scale
Lower (upper) limit	The smallest (greatest) value of the measured concentrations
Air intake device	Device for sucking air through indicator tubes

(Revised edition, Rev. No. 1).

APPLICATION 2
Reference

CHARACTERISTICS OF PRODUCED INDICATOR POWDERS FOR EQUIPMENT OF INDICATOR TUBES

Detected gas (steam)	Sucked air volume, cm3	Measurement range, mg/m3	Total air suction time, s	Gas (steam) captured by the filter cartridge	Gas (steam) interfering with the determination
nitrogen oxides					Halogens (chlorine, bromine, iodine), ozone in concentrations above 10 MPC
					Pairs of acids, alkalis and amines
					Pairs of acids, alkalis and amines
Sulfurous anhydride				Hydrogen sulfide, ammonia, nitrogen dioxide, sulfuric acid mist, water vapor
Sulfurous anhydride
Acetylene				Hydrogen sulfide, hydrogen phosphide, silicic hydrogen, ammonia, acetone and water vapours.
Acetylene
				Sulfurous anhydride, vapors of acetic acid, acetic anhydride, hydrochloric acid, in concentrations up to 10 MPC	Pairs of ketones and esters, pairs of acetic acid, acetic anhydride, hydrochloric acid and sulfurous anhydride in concentrations above 10 MPC
				Aromatic and unsaturated hydrocarbons, water vapor
				water vapor
				water vapor	Pairs of fatty and aromatic hydrocarbons
hydrogen sulfide					Mercaptans
				water vapor	Pairs of fatty and aromatic hydrocarbons
Petroleum hydrocarbons				Unsaturated and aromatic hydrocarbons, water vapor
Carbon oxide				Acetylene, ethylene, methane, a mixture of butane and propane, nitrogen oxides, chlorine, sulfur dioxide, hydrogen, gasoline vapors, benzene and its homologues, water, acetone, formic acid, formaldehyde, ethyl and methyl alcohols, dichloroethane, carbon disulfide	Pairs of metal carbonyls
					Vapors of bromine, iodine, oxidizing agents, chloramines
Ethyl ether				Vapors of water, ethyl alcohol, organic acids, phenol