ASTM_D_4599_-_14.pdf

Designation:D459914Standard Practice forMeasuring the Concentration of Toxic Gases or VaporsUsing Length-of-Stain Dosimeters1This standard is issued under the fixed designation D4599;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice describes the detection and measurementof time weighted average(TWA)concentrations of toxic gasesor vapors using length-of-stain colorimetric dosimeter tubes.Alist of some of the gases and vapors that can be detected by thispractice is provided in Annex A1.This list is given as a guideand should be considered neither absolute nor complete.1.2 Length-of-stain colorimetric dosimeters work by diffu-sional sampling.The results are immediately available byvisual observation;thus no auxiliary sampling,test,nor analy-sis equipment are needed.The dosimeters,therefore,areextremely simple to use and very cost effective.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1356 Terminology Relating to Sampling and Analysis ofAtmospheres2.2 Other Document:3U.S.Occupational Safety and Health StandardTitle29 1910.1000 Subpart Z3.Terminology3.1 DefinitionsFor definitions of terms used in thispractice,refer to Terminology D1356.4.Summary of Practice4.1 Length-of-stain colorimetric dosimeters consist of asealed glass tube containing a detector inside the tube(1-5).4The detector is a length of granulated material impregnatedwith a reactive chemical that is sensitive to the particular gasfor which the dosimeter is designed.To use the tube,one endis opened.The gas,if present,diffuses into the tube and reactswith the chemical reagent on the carrier material,causing thelatter to change color.Each lot of dosimeters is individuallycalibrated so that by measuring the length of stain and the timeof exposure,the TWAconcentration to which the dosimeter hasbeen exposed can be measured directly and immediately.4.2 Information on the correct use of length of stain dosim-eter tubes is presented.5.Significance and Use5.1 The U.S.Occupational Safety and Health Administra-tion(OSHA)in 29 CFR 1910.1000 Subpart Z designates thatcertain gases and vapors present in work place atmospheresmust be controlled so that their concentrations do not exceedspecified limits.Other countries have similar regulations.5.2 This practice will provide a means for the measurementof airborne concentrations of certain gases and vapors listed in29 CFR 1910.1000 and in other countries regulations.5.3 A partial list of chemicals for which this practice isapplicable is presented in Annex A1 with current ThresholdLimit Values(TLV)5(2)and typical measurement ranges forthe selected chemicals as obtained from various manufacturersspecifications.5.4 This practice may be used for either personal or areamonitoring.1This practice is under the jurisdiction of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.04 on Workplace AirQuality.Current edition approved Sept.1,2014.Published October 2014.Originallyapproved in 1986.Last previous edition approved in 2009 as D4599 03(2009)1.DOI:10.1520/D4599-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Code of Federal Regulations,available from U.S.Government Printing OfficeSuperintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.4The boldface numbers in parentheses refer to the list of references appended tothis practice.5Threshold Limit Values(TLV)is a registered trademark of the AmericanConference of Governmental Industrial Hygienists(ACGIH).Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Interferences6.1 The instructions may provide correction factors to beapplied when certain interferences are present.Some commoninterfering gases or vapors for each dosimeter are listed in theinstruction sheets for the dosimeter provided by the manufac-turers.7.Apparatus7.1 Dosimeter Tube:7.1.1 General DescriptionA length-of-stain dosimetertube,also called a“colorimetric diffusion tube,”consists of aglass tube containing an inert granular material impregnatedwith a chemical system that reacts with the gas or vapor ofinterest.As a result of