ASTM_D_3120_-_08_2019.pdf

Designation:D312008(Reapproved 2019)Standard Test Method forTrace Quantities of Sulfur in Light Liquid PetroleumHydrocarbons by Oxidative Microcoulometry1This standard is issued under the fixed designation D3120;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers the determination of sulfurconcentration in the range from 3.0 mg kg to 1000 mg kg inlight liquid hydrocarbons and fuels with oxygenates boiling inthe range from 26 C to 274 C(80 F to 525 F).NOTE1Preliminary data has shown that this test method is alsoapplicable to the determination of sulfur in denatured fuel ethanol(Specification D4806),automotive spark ignition engine fuel(Specifica-tion D4814),Ed75Ed85(Specification D5798)or gasoline-oxygenatefuel blends with greater than 10%ethanol.However,the precision forthese materials has not been determined.Subcommittee D02.03 isundertaking activities to obtain precision statements for these materials.1.2 Other materials falling within the distillation rangespecified in 1.1,but having sulfur concentrations above1000 mgkg,may be tested using appropriate dilutions to bringthem within the specified limit.In addition,sample types thatmay be outside the specified distillation range,such as dieselsand biodiesels,may be analyzed by this test method.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.The preferred units are milligrams per kilogram(mg/kg).1.4 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.Forspecific hazard statements,see Sections 7 9.1.5 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 WaterD1298 Test Method for Density,Relative Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4806 Specification for Denatured Fuel Ethanol for Blend-ing with Gasolines for Use as Automotive Spark-IgnitionEngine FuelD4814 Specification for Automotive Spark-Ignition EngineFuelD5798 Specification for Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-Ignition EnginesD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System Performance2.2OSHA Regulations:OSHA Regulations 29 CFR,paragraphs 1910.1000 and1910.120033.Summary of Test Method3.1 A liquid sample is introduced into a pyrolysis tubemaintained at a temperature between 900 C to 1200 C,having a flowing stream of gas containing 50%to 80%oxygen and 20%to 50%inert gas(for example,argon,helium,and so forth).Oxidative pyrolysis converts the sulfur tosulfur dioxide,which then flows into a titration cell where itreacts with triiodide ion present in the electrolyte.The triiodide1This 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 May 1,2019.Published June 2019.Originallyapproved in 1972.Last previous edition approved in 2014 as D3120 08(2014).DOI:10.1520/D3120-08R19.2For 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 U.S.Government Printing Office,Superintendent ofDocuments,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401.*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 Tech