Designation:D7455−19StandardPracticeforSamplePreparationofPetroleumandLubricantProductsforElementalAnalysis1ThisstandardisissuedunderthefixeddesignationD7455;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thispracticecoversdifferentmeansbywhichpetro-leumproductandlubricantsamplesmaybepreparedbeforethemeasurementoftheirelementalcontentusingdifferentanalyti-caltechniques.1.2Thispracticeincludesonlythebasicstepsforgenerallyencounteredsampletypes.Anythingoutoftheordinarymayrequirespecialprocedures.Seeindividualtestmethodsforinstructionstohandlesuchsituations.1.3Thispracticeisnotasubstituteforathoroughunder-standingoftheactualtestmethodtobeused,caveatsthetestmethodcontains,andadditionalsamplepreparationthatmayberequired.1.4Theusershouldnotexpandthescopeofthetestmethodstomaterialsorconcentrationsoutsidethescopeofthetestmethodsbeingusedwithoutthoroughlyunderstandingtheimplicationsofsuchdeviations.1.5Thispracticemayalsobeapplicabletosampleprepa-rationofnon-petroleumbasedbio-fuelsforelementalanalysis.Currently,workisongoinginASTMSubcommitteeD02.03;asinformationbecomesavailable,itwillbeaddedtothisstan-dard.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.8Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDoc...
