Designation:D8252−19´1StandardTestMethodforVanadiumandNickelinCrudeandResidualOilbyX-raySpectrometry1ThisstandardisissuedunderthefixeddesignationD8252;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—ThetitleofTable7wascorrectededitoriallyinOctober2019.1.Scope1.1ThistestmethodcoversthequantitativedeterminationoftotalvanadiumandnickelincrudeandresidualoilintheconcentrationrangesshowninTable1usingX-rayfluores-cence(XRF)spectrometry.1.2SulfurismeasuredforanalyticalpurposesonlyforthecompensationofX-rayabsorptionmatrixeffectsaffectingthevanadiumandnickelX-rays.FormeasurementofsulfurbystandardtestmethoduseTestMethodsD4294,D2622orothersuitablestandardtestmethodforsulfurincrudeandresidualoils.1.3ThistestmethodislimitedtotheuseofX-rayfluores-cence(XRF)spectrometersemployinganX-raytubeforexcitationinconjunctionwithwavelengthdispersivedetectionsystemorenergydispersivehighresolutionsemiconductordetectorwiththeabilitytoseparatesignalsofadjacentandnear-adjacentelements.1.4Thistestmethodusesinter-elementcorrectionfactorscalculatedfromXRFtheory,thefundamentalparameters(FP)approach,orbestfitregression.1.5SamplescontaininghigherconcentrationsthanshowninTable1mustbedilutedtobringtheelementalconcentrationofthedilutedmaterialwithinthescopeofthistestmethod.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6.1Thepreferredconcentrationsunitsaremg/kgforvanadiumandnickel.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.8Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonsta...
