1、Designation:D764919Standard Test Method forDetermination of Trace Carbon Dioxide,Argon,Nitrogen,Oxygen and Water in Hydrogen Fuel by Jet Pulse Injectionand Gas Chromatography/Mass Spectrometer Analysis1This standard is issued under the fixed designation D7649;the number immediately following the des
2、ignation 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 test method describes a procedu
3、re primarily for thedetermination of carbon dioxide,argon,nitrogen,oxygen,andwater in high pressure fuel cell grade hydrogen by gaschromatograph/mass spectrometer(GC/MS)with injection ofsample at the same pressure as sample without pressurereduction,which is called“Jet Pulse Injection.”The procedure
4、sdescribed in this method were designed to measure carbondioxide at 0.5 micromole per mole(ppmv),Argon 1 ppmv,nitrogen 5 ppmv,oxygen 2 ppmv,and water 4 ppmv.1.2 UnitsThe values stated in SI units are to be regardedas standard.The values given in parentheses after SI units areprovided for information
5、 only and are not considered standard.1.3 The mention of trade names in standard does notconstitute endorsement or recommendation for use.Othermanufacturers of equipment or equipment models can be used.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its
6、 use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principle
7、s on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2E177 Practice for Use of the Terms Preci
8、sion and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 Other Standards:3SAE TIR J2719 Information Report on the Development ofa Hydrogen Quality Guideline for Fuel Cell VehiclesApril20083.Terminology3.1 Definitions of Term
9、s Specific to This Standard:3.1.1 absolute pressure,npressure measured with refer-ence to absolute zero pressure,usually expressed as kPa,mmHg,bar or psi.3.1.1.1 DiscussionAll the pressures mentioned in thismethod are absolute pressure.3.1.2 constituent,na component(or compound)foundwithin a hydroge
10、n fuel mixture.3.1.3 contaminant,nimpurity that adversely affects thecomponents within the fuel cell system or the hydrogen storagesystem by reacting with its components.3.1.3.1 DiscussionAn adverse effect can be reversible orirreversible.3.1.4 dynamic calibration,ncalibration of an analyticalsystem
11、 using calibration gas standard generated by dilutingknown concentration compressed gas standards with hydrogen,as used in this method for carbon dioxide,argon,nitrogen,andoxygen(7.3 and 7.4).3.1.5 extracted ion chromatogram(EIC),na GC/MSchromatogram where a selected ion is plotted to determine thec
12、ompound(s)of interest.3.1.6 fuel cell grade hydrogen,nhydrogen satisfying thespecifications in SAE TIR J2719.3.1.7 hydrogen fuel,nhydrogen to be tested withoutcompositional change due to sample introduction,etc.1This test method is under the jurisdiction ofASTM Committee D03 on GaseousFuels and is t
13、he direct responsibility of Subcommittee D03.14 on Hydrogen andFuel Cells.Current edition approved Dec.1,2019.Published February 2020.Originallyapproved in 2010.Last previous edition approved in 2017 as D7649 10(2017).DOI:10.1520/D7649-19.2For referenced ASTM standards,visit the ASTM website,www.ast
14、m.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,
15、100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Reco
16、mmendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.3.1.8 jet pulse injection,nhigh pressure hydrogen fuelsample is introduced instantaneously at the same pressure intoGC/MS.3.1.9 relative humidity,nratio of actual pressure of exist-ing water vapor to maximum possible pressure of water vaporin the atmosphere at the same temperature,expressed as apercentage.3.1.10 response factor(RF),nthe amount in volume(L)of an analyte divided by the EIC area of the anal