ASTM_D_7892_-_15.pdf

Designation:D789215Standard Test Method forDetermination of Total Organic Halides,Total Non-MethaneHydrocarbons,and Formaldehyde in Hydrogen Fuel by GasChromatography/Mass Spectrometry1This standard is issued under the fixed designation D7892;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 The gas chromatography/mass spectrometry(GC/MS)procedure described in this method is used to determineconcentrations of total organic halides and total non-methanehydrocarbons(TNMHC)by measurement of individual targethalocarbons(Table1)andhydrocarbons(includingformaldehyde,Table 1 and Table 2),respectively.Measure-ment of these substances is required for application of SAEJ2719 to hydrogen fuel quality where this fuel is intended foruse in fuel cell vehicles.SAE 2719 states hydrogen fuel isexpected to contain less than 0.05 mole/mole total haloge-nates(including organic halides),2 mole/mole total non-methane hydrocarbons(C1 Basis,3.2.16)and 0.01 mole/moleformaldehyde.1.2 Based upon the GC/MS/full scan analysis of a 400 mLhydrogen sample,the reporting limit(RL)is 0.001 mole/molefor each target compound listed in Table 1 and Table 2,with theexception of 0.002 mole/mole for ethane and 0.002 mole/mole for ethene.1.3 Mention of trade names in this standard does notconstitute endorsement or recommendation for use.Othermanufacturers equipment or equipment models can be used.1.4 The values stated in SI units are to be regarded asstandard.1.5 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:2D4150 Terminology Relating to Gaseous FuelsD7606 Practice for Sampling of High Pressure Hydrogenand Related Fuel Cell Feed Gases2.2 Other Standards:3SAE J2719 Information Report on the Development of aHydrogen Quality Guideline for Fuel Cell Vehicles3.Terminology3.1 DefinitionsFor definitions of terms use in this testmethod,refer to Terminology D4150.3.2 Definitions:3.2.1 absolute pressurepressure measured with referenceto absolute zero pressure usually expressed as kPa,mm Hg,baror psi.3.2.2 constituentcomponent(or compound)found withina hydrogen fuel mixture.3.2.3 contaminantcontaminant as defined in this applica-tion is an impurity that adversely affects the components withina fuel cell system or hydrogen storage system.3.2.4 cryogena refrigerant is used to obtain very lowtemperatures.The cryogen used in this method is liquidnitrogen(bp-196 C).3.2.5 dynamic calibrationCalibration of an analytical sys-tem uses gaseous calibration standard generated by diluting aknown concentration of compressed gaseous standard with adiluent gas.3.2.6 fuel cell grade hydrogenhydrogen satisfying thespecifications in SAE J2719.1This test method is under the jurisdiction ofASTM Committee D03 on GaseousFuels and is the direct responsibility of Subcommittee D03.14 on Hydrogen andFuel Cells.Current edition approved June 1,2015.Published July 2015.DOI:10.1520/D7892-15.2For 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 SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096,http:/www.sae.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 TABLE 1 Organic HalidesTarget CompoundsFormulasMWBPCMPCCAS No.Retention Time(min)1,1,1-TrichloroethaneC2H3Cl3133.474-3371-55-68.8761,1,2,2-TetrachloroethaneC2H2Cl4167.9147-4479-34-514.6271,1,2-TrichloroethaneC2H3Cl3133.4114-3779-00-511.6071,2-DibromoethaneC2H4Br2187.913210106-93-412.5551,1-DichloroethaneC2H4Cl29957-9775-34-37.0341,1-DichloroetheneC2H2Cl296.932-12275-35-45.9271,2,4-TrichlorobenzeneC6H3Cl3181.521417120-82-119.7951,2,3,4-tetrachlorohexafluorobutaneC4Cl4F6303.41340 dl;73 meso375-45-113.0081,2-DichloroethaneC2H4Cl29984-35107-06-28.6581,2-DichloropropaneC3H6Cl211396-10078-87-510.0061,2-DichlorobenzeneC6H4Cl2147181-1795-50-117.3341,3-DichlorobenzeneC6H4Cl2147173-24541-73-116.7991,4-DichlorobenzeneC6H4Cl214717454106-46-716.881Benzyl ChlorideC7H7Cl126.6179-39100-44-716.769BromodichloromethaneCHBrCl216290-5775-27-410.189BromoformCHBr3252.7149875-25-214.303BromomethaneCH3Br94.94-9474-83-94.326Carbon tetrachlorideCCl4153.877-2356-23-59.418ChlorobenzeneC6H5Cl112.6131-45108-90-713.626ChloroethaneC2H5Cl64.512-13975-00-34.52ChloroformCHCl3119.461-6467-66-37.987ChloromethaneCH3Cl50.55-2474-87-33.504cis-1,2-dichloroetheneC2H2Cl29760-81156-59-27.728cis-1,