ASTM_D_7524_-_10_2015.pdf

Designation:D752410(Reapproved 2015)IP 568/08Standard Test Method forDetermination of Static Dissipater Additives(SDA)inAviation Turbine Fuel and Middle Distillate FuelsHighPerformance Liquid Chromatograph(HPLC)Method1This standard is issued under the fixed designation D7524;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 staticdissipater additive(SDA)content of aviation turbine fuel andmiddle distillate fuels.1.2 The precision of this test method has been establishedfor aviation turbine fuel over the concentration range of1 mg L to 12 mgL.Higher concentrations can be determinedby dilution,but the precision of the test method will not apply.NOTE1The SDA used to develop this test method was STADIS 4502for aviation fuels and STADIS 450 and 4252for middle distillates.1.3 The test method includes a procedure to concentrate thesulfonic acid component in the SDA prior to analysis.1.4 The test method only applies to SDAs that contain alkylsubstituted sulfonic acid.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 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.2.Referenced Documents2.1 ASTM Standards:3D4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum Products2.2 ISO Standards:4EN ISO 3696 Water for Analytical Laboratory UseSpecifications and Test Methods2.3 Energy Institute Standards:5IP 568/08 Determination of the Static Dissipater Additives(SDA)in Aviation Turbine Fuel and Middle DistillateFuelsHPLC Method3.Terminology3.1 Definitions:3.1.1 middle distillate fuels,ngeneric refinery/supplierterm that usually denotes a fuel primarily intended for use incompression ignition/diesel engine applications,and also innon-aviation gas turbine engines and other non-automotiveapplications such as a burner fuel.3.2 Definitions of Terms Specific to This Standard:3.2.1 aviation turbine fuel,nfuel used for powering jetand turbo-prop engine aircraft.3.2.2 conductivity improver additive,nmaterial added to afuel in very small amounts to increase its electrical conductiv-ity and thereby reduce relaxation time.3.2.2.1 DiscussionConductivity improver additives arealso known as static dissipater additives(SDAs)or antistaticadditives.4.Summary of Test Method4.1 A solid phase extraction procedure is used to concen-trate the sulfonic acid component of SDApresent in an aviationturbine fuel or middle distillate fuel sample prior to analysis.A1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.04.0C on Liquid Chromatography.Current edition approved April 1,2015.Published May 2015.Originallyapproved in 2010.Last previous edition approved in 2010 as D7524 10.DOI:10.1520/D7524-10R15.2Stadis 450 and 425 are registered trademarks marketed by Innospec,Inc.,Innospec Manufacturing Park,Oil Sites Road,Ellesmere Port,Cheshire Ch65 4EY,UK.3For 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.4Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,Case postale 56,CH-1211,Geneva 20,Switzerland,http:/www.iso.ch.5Available from Energy Institute,61 New Cavendish St.,London,WIG 7AR,U.K.,http:/www.energyinst.org.uk.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 fixed volume of the concentrated test fraction is injected into acalibrated high performance liquid chromatograph.An analyti-cal column is used to separate the sample components of thetest fraction by polarity.4.2 The analytical column is attached to a liquid chroma-tography detector where the sulfonic acid components arereadily detected by UV absorption as they elute from thecolumn.The electronic signal from the liquid chromatographydetector is continually monitored by a chromatography datasystem.The amplitudes of the signal(peak area)from thesulfonic acids are compared with those obtained from previ-ously measured calibration standards in order to calculate thepercent m/V SDA present in the sample.4.3 The test method only applies to SDAs that contain alkylsubstituted sulfonic acids.5.Significance and Use5.1 This test method will allow the