Standard Practice for Measuring the Concentration of Toxic Gases or Vapors Using Length-of-Stain Dosimeters

SIGNIFICANCE AND USE
The Federal Occupational Safety and Health Administration in 29 CFR 1910.1000 Subpart Z designates that certain gases and vapors present in work place atmospheres must be controlled so that their concentrations do not exceed specified limits.
This practice will provide a means for the determination of airborne concentrations of certain gases and vapors listed in 29 CFR 1910.1000.
A partial list of chemicals for which this practice is applicable is presented in Annex A1 with current Threshold Limit Values (TLV) (2)  and typical measurement ranges for the selected chemicals as obtained from various manufacturer’specifications.
This practice may be used for either personal or area monitoring.
SCOPE
1.1 This practice describes the detection and measurement of time weighted average (TWA) concentrations of toxic gases or vapors using length-of-stain colorimetric dosimeter tubes. A list of some of the gases and vapors that can be detected by this practice is provided in Annex A1. This list is given as a guide and should be considered neither absolute nor complete.  
1.2 Length-of-stain colorimetric dosimeters work by diffusional sampling. The results are immediately available by visual observation; thus no auxiliary sampling, test nor analysis equipment are needed. The dosimeters, therefore, are extremely simple to use and very cost effective.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Publication Date
09-Apr-2003
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
Designation:D4599–03
Standard Practice for
Measuring the Concentration of Toxic Gases or Vapors
1
Using Length-of-Stain Dosimeters
This standard is issued under the fixed designation D4599; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Summary of Practice
1.1 This practice describes the detection and measurement 4.1 Length-of-stain colorimetric dosimeters consist of a
4
of time weighted average (TWA) concentrations of toxic gases sealed glass tube containing a detector inside the tube (1-5).
or vapors using length-of-stain colorimetric dosimeter tubes.A The detector is a length of granulated material impregnated
listofsomeofthegasesandvaporsthatcanbedetectedbythis with a reactive chemical that is sensitive to the particular gas
practice is provided in Annex A1. This list is given as a guide for which the dosimeter is designed. To use the tube, one end
and should be considered neither absolute nor complete. is opened. The gas, if present, diffuses into the tube and reacts
1.2 Length-of-stain colorimetric dosimeters work by diffu- with the chemical reagent on the carrier material, causing the
sional sampling. The results are immediately available by latter to change color. Each lot of dosimeters is individually
visualobservation;thusnoauxiliarysampling,testnoranalysis calibrated so that by measuring the length of stain and the time
equipment are needed. The dosimeters, therefore, are ex- ofexposure,theTWAconcentrationtowhichthedosimeterhas
tremely simple to use and very cost effective. been exposed can be determined directly and immediately.
1.3 This standard does not purport to address all of the 4.2 Information on the correct use of length of stain dosim-
safety concerns, if any, associated with its use. It is the eter tubes is presented.
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
5.1 The Federal Occupational Safety and Health Adminis-
bility of regulatory limitations prior to use.
tration in 29 CFR 1910.1000 Subpart Z designates that certain
2. Referenced Documents
gases and vapors present in work place atmospheres must be
2
2.1 ASTM Standards: controlled so that their concentrations do not exceed specified
D1356 Terminology Relating to Sampling and Analysis of limits.
Atmospheres 5.2 This practice will provide a means for the determination
2.2 Other Document: of airborne concentrations of certain gases and vapors listed in
Federal Occupational Safety and Health Standard—Title 29 CFR 1910.1000.
3
29 1910.1000 Subpart Z 5.3 A partial list of chemicals for which this practice is
applicable is presented in Annex A1 with current Threshold
3. Terminology
LimitValues(TLV)(2)andtypicalmeasurementrangesforthe
3.1 For definitions of terms used in this practice, refer to selected chemicals as obtained from various manufacturer’s
Terminology D1356.
specifications.
5.4 This practice may be used for either personal or area
monitoring.
1
This practice is under the jurisdiction ofASTM Committee D22 onAir Quality
and is the direct responsibility of Subcommittee D22.04 on Workplace Atmo-
spheres.
Current edition approved April 10, 2003. Published June 2003. Originally
approved in 1986. Last previous edition approved in 1997 as D4599 – 97. DOI:
10.1520/D4599-03.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
Code of Federal Regulations, available from U.S. Government Printing Office, The boldface numbers in parentheses refer to the list of references appended to
Washington, DC 20402. this practice.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D4599–03
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6. Interferences
k = absorption capacity of a layer element, ng/cm , and
2
A = cross-sectional area of the reagent layer, cm assumed
6.1 The instructions may provide correction factors to be
constant.
applied when certain interferences are present. Some common
interfering gases or vapors for each dosimeter are listed in the This process, called chemisorption, has the following effects
instruction sheets for the dosimeter provided by the manufac-
on the remaining measuring process:
turers
9.1.1 Since the gas molecules to be measured are bound
chemically, they are practically no longer present in the
7. Apparatus
atmosphere
...

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