ASTM_D_3687_-_07_2012.pdf

Designation:D368707(Reapproved 2012)Standard Practice forAnalysis of Organic Compound Vapors Collected by theActivated Charcoal Tube Adsorption Method1This standard is issued under the fixed designation D3687;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 covers the applications of methods for theextraction and gas chromatographic determination of organicvapors that have been adsorbed from air in sampling tubespacked with activated charcoal.1.2 This practice is complementary to Practice D3686.1.3 This practice is applicable for analysis of samples takenfrom workplace or other atmospheres provided that the con-taminant adsorbs onto charcoal,that it can be adequatelyextracted from the charcoal,and that it can be analyzed by gaschromatography(GC).Other adsorbents and other extractiontechniques are described in Practice D6196.1.4 Organic compounds of multicomponent samples maymutually interfere during analysis.Methods to resolve inter-ferences are given in Section 6.1.5 The values stated in SI units are to be regarded as thestandard.1.6 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.Specific precau-tions are given in 8.4,9.2,and in A1.2.3.2.Referenced Documents2.1 ASTM Standards:2D1356 Terminology Relating to Sampling and Analysis ofAtmospheresD3686 Practice for Sampling Atmospheres to Collect Or-ganic Compound Vapors(Activated Charcoal Tube Ad-sorption Method)D6196 Practice for Selection of Sorbents,Sampling,andThermal Desorption Analysis Procedures for Volatile Or-ganic Compounds in AirE355 Practice for Gas Chromatography Terms and Relation-ships2.2 NIOSH Standards:CDC-99-74-45Documentationof NIOSH ValidationTests3NIOSH Manual of Analytical Methods,4thEd.42.3 OSHA Standards:29 CFR 1910 Code of Federal Regulations,RegulationsRelating to Labor,Occupational Safety and HealthAdministration,Department of Labor5OSHA Sampling and Analytical Methods62.4 UK Health and Safety Executive(HSE):7Methods for the Determination of Hazardous Substances(MDHS)2.5 Berufsgenossenschaftliches Institut fr Arbeitsschulz(BGIA):8GESTIS Analytical Methods3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this practice,refer tothe terminology specified in D1356 and E355.4.Summary of Practice4.1 Organic vapors that have been collected on activatedcharcoal are extracted with carbon disulfide or another appro-priate solvent and are determined by GC using a flameionization detector(FID).Carbon disulfide is a relatively small1This practice is under the jurisdiction ofASTM Committee D22 on Air Qualityand is the direct responsibility of Subcommittees D22.04 on WorkplaceAir Quality.Current edition approved April 1,2012.Published July 2012.Originallyapproved in 1978.Last previous edition approved in 2007 as D3687-07.DOI:10.1520/D3687-07R12.2For 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.3Available from the U.S.Department of Commerce,National Technical Infor-mation Service,Port Royal Road,Springfield,VA 22161.4NIOSH Manual of Analytical Methods(NMAM).http:/www.cdc.gov/niosh/nmam/(accessed 1/2007).5Available from Superintendent of Documents,U.S.Government PrintingOffice,Washington,DC 20402.6OSHA Sampling and Analytical Methods,http:/www.osha.gov/dts/sltc/methods/index.html(accessed 1/2007).7HSE Methods for the Determination of Hazardous Substances(MDHS).http:/www.hse.gov.uk/pubns/mdhs/index.htm#(accessed 1/2007).8GESTIS Analytical Methods.http:/www.hvbg.de/e/bia/gestis/analytical_methods/index.html(accessed 1/2007).Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 molecule that can penetrate the“ink-bottle”shaped pores ofactivated charcoal,it has a high heat of adsorption on activatedcharcoal which helps in displacing other adsorbed molecules,and it is a reasonably good solvent for most,especiallynon-polar,organic molecules.Polar modifiers(such as N,N-dimethylformamide)are frequently added to enhance the re-covery of polar organic compounds.Other advantages to usingcarbon disulfide include an early elution time on most GCcolumns and a small FID response.4.2 Interferences resulting from the analytes having similarretention times during GC analysis are resolved by changingthe GC column,by changing the operating parameters,or byfractionating the sample using solvent extraction as describedin Section A