ASTM_D_8098_-_17.pdf

Designation:D809817Standard Test Method forPermanent Gases in C2and C3Hydrocarbon Products byGas Chromatography and Pulse Discharge HeliumIonization Detector1This standard is issued under the fixed designation D8098;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 test method covers the determination of hydrogen,nitrogen,oxygen,methane,carbon monoxide,and carbondioxide in the parts per billion mole(nmol/mol)to parts permillion mole(mol/mol)range in C2and C3hydrocarbons.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 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.For some specifichazard statements,see Annex A1.1.4 This international standard was developed in accor-dance with internationally recognized principles 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:2D2505 Test Method for Ethylene,Other Hydrocarbons,andCarbon Dioxide in High-Purity Ethylene by Gas Chroma-tographyD4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products andLubricantsD7915 Practice for Application of Generalized ExtremeStudentized Deviate(GESD)Technique to Simultane-ously Identify Multiple Outliers in a Data SetE260 Practice for Packed Column Gas ChromatographyF307 Practice for Sampling Pressurized Gas for Gas Analy-sis2.2 Other Standards:3G-4 and G-4.1,Compressed Gas Association Booklet on theUse of Oxygen3.Terminology3.1 For definitions of terms used in this standard,seeTerminology D4175.4.Summary of Test Method4.1 The sample is separated in a gas chromatographicsystem using gas chromatography columns.Hydrogen,oxygen,nitrogen,methane,carbon monoxide,and carbondioxide(also known as the permanent gases)are detected on apulse discharge detector.The concentration of the gases to bedetermined is calculated from the peak areas relative to anexternal standard.Helium is the required carrier gas for thisdetector.Ultra-high purity carrier gases and leak-free gaschromatography(GC)systems with getters are essential due tothe extreme sensitivity of the detector.Argon,if present in thesample,may interfere with oxygen determination.5.Significance and Use5.1 The presence of trace amounts of hydrogen,oxygen,carbon monoxide,and carbon dioxide can have deleteriouseffects in certain processes using hydrocarbon products as feedstock.This test method is suitable for setting specifications,foruse as an internal quality control tool,and for use in develop-ment and research work.6.Apparatus6.1 ChromatographAny gas chromatograph capable ofmaintaining the temperatures,pressures,and flows necessary1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.D0.02 on Ethylene.Current edition approved July 15,2017.Published September 2017.DOI:10.1520/D8098-17.2For 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 this standards Document Summary page onthe ASTM website.3Available from Compressed Gas Association(CGA),14501 George CarterWay,Suite 103,Chantilly,VA 20151,http:/.Copyright ASTM International,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 Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 for this analyses.The GC should also be capable of tempera-ture programming of the oven to obtain optimum separation ofthe components.A typical configuration is shown in Fig.1.6.2 Detectors(PDHID Pulse Discharge Detector HeliumIonization)The PDHID detector is very sensitive to mostorganic or inorganic chemicals,thus requiring separation of theproduct gases from the permanent gas components.6.2.1 Alternative DetectorsThis test method is written forthe pulsed discharge helium detector(PDHID),but otherdetectors can be used provided they have sufficient sensitivity,respo