1、Designation:D731922Standard Test Method forDetermination of Existent and Potential Sulfate andInorganic Chloride in Fuel Ethanol and Butanol by DirectInjection Suppressed Ion Chromatography1This standard is issued under the fixed designation D7319;the number immediately following the designation ind
2、icates 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 a direct injection ion
3、chromato-graphic procedure for determining existent and potential inor-ganic sulfate and total inorganic chloride content in hydrousand anhydrous denatured ethanol and butanol to be used inmotor fuel applications.It is intended for the analysis ofethanol and butanol samples containing between 1.0 mg
4、 kg to20 mg/kg of existent or potential inorganic sulfate and1.0 mgkg to 50 mg/kg of inorganic chloride.NOTE1Tertiary butanol is not included in this test method.1-butanol,2-butanol,and isobutanol are included in the testing and research reportfor this test method.1.2 The values stated in SI units a
5、re 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,health,and environmenta
6、l practices and deter-mine the applicability of regulatory limitations prior to use.Material Safety Data Sheets are available for reagents andmaterials.Review them for hazards prior to usage.1.4 This international standard was developed in accor-dance with internationally recognized principles on st
7、andard-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:2D1193 Specification for Reagent WaterD4052 Test
8、 Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD4177 Practice for Automatic Sampling of Petroleum andPetroleum Produ
9、ctsD5827 Test Method for Analysis of Engine Coolant forChloride and Other Anions by Ion ChromatographyD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6792 Practice for Quality Management Systems in Petro-le
10、um Products,Liquid Fuels,and Lubricants TestingLaboratoriesD7318 Test Method for Existent Inorganic Sulfate in Ethanolby Potentiometric TitrationD7328 Test Method for Determination of Existent and Po-tential Inorganic Sulfate and Total Inorganic Chloride inFuel Ethanol by Ion Chromatography Using Aq
11、ueousSample Injection2.2 European Norm Standards:3EN 15492 Ethanol as a blending component for petrolDetermination of inorganic chloride and sulfate contentIon chromatographic method3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,referto Terminology D4175.3.2 Def
12、initions of Terms Specific to This Standard:3.2.1 existent inorganic sulfate,ninorganic sulfate speciesactually present in the sample at the time of analysis with nooxidation treatment.3.2.2 inorganic chloride,nchloride present as hydrochlo-ric acid,ionic salts of this acid,or mixtures of these.1Thi
13、s test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.03 on Elemental Analysis.Current edition approved Oct.1,2022.Published October 2022.Originallyapproved in 2007.Last previous edition appr
14、oved in 2017 as D7319 17.DOI:10.1520/D7319-22.2For 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 Amer
15、ican National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*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 standar
16、d 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.13.2.3 inorganic sulfate,nsulfate(SO4-2)species present assulfuric acid,ionic salts of this acid,or mixtures of these.3.2.4 potential sulfate,ninorganic sulfate species presentafter the sample has been reacted wi
