Designation:D7372−12AnAmericanNationalStandardStandardGuideforAnalysisandInterpretationofProficiencyTestProgramResults1ThisstandardisissuedunderthefixeddesignationD7372;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisguidecoverstheanalysisandinterpretationofproficiencytest(PT)programresults.Forparticipantsininterlaboratoryproficiencytest(PT)(orcrosscheck,checkscheme,etc.)programs,thisguidedescribesproceduresforassessingparticipants’resultsrelativetothePTprogramresultsandpotentiallyimprovingthelaboratory’stestingperformancebasedontheassessmentfindingsandinsights.Forthecommitteesresponsibleforthetestmethodsincludedininterlaboratoryproficiencytestingprograms,thisguidede-scribesproceduresforassessingindustry’sabilitytoperformtestmethodsandforpotentiallyidentifyingneedsformethodimprovement.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1266TestMethodforSulfurinPetroleumProducts(LampMethod)D2622TestMethodforSulfurinPetroleumProductsbyWavelengthDispersiveX-rayFluorescenceSpectrometryD4294TestMethodforSulfurinPetroleumandPetroleumProductsbyEnergyDispersiveX-rayFluorescenceSpec-trometryD4951TestMethodforDeterminationofAdditiveElementsinLubricatingOilsbyInductivelyCoupledPlasmaAtomicEmissionSpectrometryD5185TestMethodforMultielementDeterminationofUsedandUnusedLubricatingOilsandBaseOilsbyInductivelyCoupledPlasmaAtomicEmissionSpectrom-etry(ICP-AES)D5453TestMethodforDeterminationofTotalSulfurinLightHydrocarbons,SparkIgnitionEngineFuel,DieselEngineFuel,andEngineOilbyUltravioletFluorescenceD6259PracticeforDeterminationofaPo...
