Designation:D7751−14StandardTestMethodforDeterminationofAdditiveElementsinLubricatingOilsbyEDXRFAnalysis1ThisstandardisissuedunderthefixeddesignationD7751;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthequantitativedeterminationofadditiveelementsinunusedlubricatingoilsandadditivepackages,asshowninTable1.Thepooledlimitofquantitationofthistestmethodasobtainedbystatisticalanalysisofinterlaboratorytestresultsis0.02%formagnesium,0.003%forphosphorus,0.002%forsulfur,0.001%forchlorine,0.003%forcalcium,0.001%forzinc,and0.002%formolybdenum.1.2Additivepackagesrequiredilutionwithacontaminationfreediluent(baseoil)priortoanalysis.ThedilutionfactorhastobecalculatedfromtheexpectedconcentrationstobringtheconcentrationsforallelementsintotherangeslistedinTable1.1.3SomelubricationoilswillcontainhigherconcentrationsthanthemaximumconcentrationslistedinTable1.Thesesamplesrequiredilutionwithacontaminationfreediluent(baseoil)priortoanalysis.ThedilutionfactorhastobecalculatedfromtheexpectedconcentrationstobringtheconcentrationsforallelementsintotherangeslistedinTable1.1.4ThistestmethodislimitedtotheuseofenergydispersiveX-rayfluorescence(EDXRF)spectrometersem-ployinganX-raytubeforexcitationinconjunctionwiththeabilitytoseparatethesignalsofadjacentelementsbyusingahighresolutionsemiconductordetector.1.5Thistestmethodusesinter-elementcorrectionfactorscalculatedfromafundamentalparameters(FP)approachorfromanothermatrixcorrectionmethod.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6.1Thepreferredconcentrationunitsaremg/kgormass%.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpr...
