ASTM_D_3703_-_13.pdf

Designation:D370313Standard Test Method forHydroperoxide Number of Aviation Turbine Fuels,Gasolineand Diesel Fuels1This standard is issued under the fixed designation D3703;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 Department of Defense.1.Scope*1.1 This test method covers the determination of the hy-droperoxide content expressed as hydroperoxide number ofaviation turbine,gasoline and diesel fuels.1.2 The range of hydroperoxide number included in theprecision statement is 0 to 50 mg/kg active oxygen as hydrop-eroxide.1.3 The interlaboratory study to establish the precision ofthis test method consisted of spark-ignition engine fuels(regular,premium and California Cleaner-Burning gasoline),aviation gasoline,jet fuel,ultra low sulfur diesel,and biodiesel.However,biodiesel was not included in the precision calcula-tion because of the large differences in results within labs andbetween labs.1.4 This test method detects hydroperoxides such as t-butylhydroperoxide and cumene hydroperoxide.It does not detectsterically-hindered hydroperoxides such as dicumyl and di-t-butyl hydroperoxides1.5 Di-alkyl hydroperoxides added commercially to dieselfuels are not detected by this test method.1.6 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.7 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 consult andestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.For specific warning statements,see 7.3,7.6,9.2,and AnnexA1.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD6447 Test Method for Hydroperoxide Number of AviationTurbine Fuels by Voltammetric Analysis2.2 Other Standards:CRC Report No.559 Determination of the HydroperoxidePotential of Jet Fuels34500-C1 B.Iodometric Method IStandard Methods forthe Examination of Water and Wastewater43.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 hydroperoxide,norganic peroxide having the gener-alized formula ROOH.3.1.1.1 DiscussionThis test method detects hydroperox-ides such as t-butyl hydroperoxide(CH3)3COOH and cumenehydroperoxide C6H5C(CH3)2OOH.It does not detectsterically-hindered hydroperoxides such as dicumyl and di-t-butyl hydroperoxides.3.1.2 hydroperoxide number,nan indication of the quan-tity of oxidizing constituents present in certain liquid fuels asdetermined by this test method.3.1.2.1 DiscussionThe higher the quantity of oxidizingconstituents in the fuels,the higher the hydroperoxide number.4.Summary of Test Method4.1 Aquantityofsampledissolvedin2,2,4-trimethylpentane is contacted with aqueous potassium iodidesolution.The hydroperoxides present are reduced by the1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.05 on Properties of Fuels,Petroleum Coke and Carbon Material.Current edition approved Oct.1,2013.Published October 2013.Originallyapproved in 1978.Last previous edition approved in 2012 as D3703 07(2012).DOI:10.1520/D3703-13.2For 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 the Coordinating Research Council,Inc.,219 Perimeter CenterParkway,Atlanta,GA 30346.4Published by the American Health Assoc.,the American Water Works Assoc.and Water Environment Federation.Available from American Public HealthPublication Sales,P.O.Box 753,Waldorf,MD 206040753.*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 States1 potassium iodide.An equivalent amount of iodine is liberated,which is titrated with an aqueous sodium thiosulfate solution.The results are calculated as milligrams of hydroperoxide perkilogram of sample expressed as hydroperoxide number.(SeeNote 1.)NOTE1The original standard D3703 was published in 1978 asStandard Test Method for Peroxide Number of Aviation Turbine Fuels.This test method originally used carbon tetrachloride(CCl4),which wasdetermined to be carcinogenetic.CCl4was later replaced with 1,1,2-trichloro-1,2,2 trifluoroethane.1,1,2-trichloro-1,2,2-trifluoroethane is anozone depleting substance.The use of an ozone depleting substanceprecludes its use by many operators.5.