ASTM_D_7756_-_19.pdf

Designation:D775619Standard Test Method forResidues in Liquefied Petroleum(LP)Gases by GasChromatography with Liquid,On-Column Injection1This standard is issued under the fixed designation D7756;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.Scope*1.1 This test method covers the determination,by gaschromatography,of soluble hydrocarbon materials,sometimescalled“oily residue,”which can be present in liquefiedpetroleum(LP)gases and which are substantially less volatilethan the LPG product.1.2 This test method quantifies,in the range of 10 mg kg to600 mgkg(ppm mass),the residue with a boiling pointbetween 174 C and 522 C(C10to C40)in LPG.Higherboiling materials,or materials that adhere permanently to thechromatographic column,will not be detected.1.3 Appendix X3,Appendix X4,and Appendix X6 describeadditional applications which could be performed based on thehardware and procedures described in this test method.Appen-dix X3 describes a test procedure for expanding the analysisrange to benzene,Appendix X4 describes a test procedure forthe analysis of diisopropanolamine,and Appendix X6 de-scribes a test procedure for the analysis of heavy residues orcontaminants from C40to about C60in LPG.1.4 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 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:2D1265 Practice for Sampling Liquefied Petroleum(LP)Gases,Manual MethodD1835 Specification for Liquefied Petroleum(LP)GasesD2158 Test Method for Residues in Liquefied Petroleum(LP)GasesD2163 Test Method for Determination of Hydrocarbons inLiquefied Petroleum(LP)Gases and Propane/PropeneMixtures by Gas ChromatographyD2421 Practice for Interconversion of Analysis of C5andLighter Hydrocarbons to Gas-Volume,Liquid-Volume,orMass BasisD2598 Practice for Calculation of Certain Physical Proper-ties of Liquefied Petroleum(LP)Gases from Composi-tional AnalysisD3700 Practice for Obtaining LPG Samples Using a Float-ing Piston CylinderD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products andLubricantsD6667 Test Method for Determination of Total VolatileSulfur in Gaseous Hydrocarbons and Liquefied PetroleumGases by Ultraviolet FluorescenceE355 Practice for Gas Chromatography Terms and Relation-shipsE594 Practice for Testing Flame Ionization Detectors Usedin Gas or Supercritical Fluid Chromatography3.Terminology3.1 Definitions of Terms Concerning ChromatographyThis test method makes reference to many common gaschromatographic procedures,terms,and relationships.Detaileddefinitions of these can be found in Practices E355 and E594.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.H0 on Liquefied Petroleum Gas.Current edition approved May 1,2019.Published June 2019.Originallyapproved in 2011.Last previous edition approved in 2018 as D7756 18.DOI:10.1520 D7756-19.2For 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.*A Summary of Changes section appears at the end of this standardCopyright 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 3.2 Definitions of Terms Concerning Liquefied PetroleumGasesThis test method makes reference to the definitions ofliquefied petroleum gases as described in Specification D1835.3.3 Definitions of Terms Specific to Thi