ASTM_D_7328_-_22.pdf

Designation:D732822Standard Test Method forDetermination of Existent and Potential Inorganic Sulfateand Total Inorganic Chloride in Fuel Ethanol by IonChromatography Using Aqueous Sample Injection1This standard is issued under the fixed designation D7328;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 an ion chromatographic proce-dure for the determination of the existent inorganic andpotential sulfate and total inorganic chloride content in hydrousand anhydrous denatured ethanol to be used in motor fuelapplications.It is intended for the analysis of ethanol samplescontaining between 0.55 mg kg and 20 mg kg of existentinorganic sulfate,4.0 mg kg to 20 mg kg of potential inorganicsulfate,and 0.75 mg kg to 50 mg kg of total inorganic chlo-ride.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,health,and environmental 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 usage1.4 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:2D1193 Specification for Reagent WaterD4052 Test 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 ProductsD5827 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-leum Products,Liquid Fuels,and Lubricants TestingLaboratoriesD7318 Test Method for Existent Inorganic Sulfate in Ethanolby Potentiometric TitrationD7319 Test Method for Determination of Existent and Po-tential Sulfate and Inorganic Chloride in Fuel Ethanol andButanol by Direct Injection Suppressed Ion Chromatog-raphy2.2 Other Standard:ISO/CEN15492Ethanol as a Blending Component forPetrolDetermination of Inorganic ChlorideIon Chro-matographic Method33.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,referto Terminology D4175.3.2 Definitions 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.1This 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 approved in 2017 as D7328 17.DOI:10.1520/D7328-22.2For 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 International Organization for Standardization(ISO),1 rue deVaremb,Case postale 56,CH-1211,Geneva 20,Switzerland,http:/www.iso.ch.*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.13.2.3 inorganic sulfate,nsulfate species present as sulfu-ric acid,ionic salts of this acid,or mixtures of these.3.2.4 potential sulfate,ntotal inorganic sulfate speciespresent after the sample has been reacted with an oxidizingagent.4.Summary of Test Method4.1 For existent inorganic sulfate and chloride,a smallvolume of a sample is evaporated to d