Designation:D5708−15(Reapproved2020)´1StandardTestMethodsforDeterminationofNickel,Vanadium,andIroninCrudeOilsandResidualFuelsbyInductivelyCoupledPlasma(ICP)AtomicEmissionSpectrometry1ThisstandardisissuedunderthefixeddesignationD5708;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditoriallyupdatedX2.19inJuly2020.1.Scope1.1Thesetestmethodscoverthedeterminationofnickel,vanadium,andironincrudeoilsandresidualfuelsbyinductivelycoupledplasma(ICP)atomicemissionspectrom-etry.Twodifferenttestmethodsarepresented.1.2TestMethodA(Sections7–11and18–22)—ICPisusedtoanalyzeasampledissolvedinanorganicsolvent.Thistestmethodusesoil-solublemetalsforcalibrationanddoesnotpurporttoquantitativelydetermineordetectinsolubleparticu-lates.1.3TestMethodB(Sections12–22)—ICPisusedtoanalyzeasamplethatisdecomposedwithacid.1.4Theconcentrationrangescoveredbythesetestmethodsaredeterminedbythesensitivityoftheinstruments,theamountofsampletakenforanalysis,andthedilutionvolume.Aspecificstatementisgivenin15.2.Typically,thelowconcentrationlimitsareafewtenthsofamilligramperkilogram.PrecisiondataareprovidedfortheconcentrationrangesspecifiedinSection21.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.1.5.1Exception—Thevaluesgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(...
