Designation:D7040−04(Reapproved2015)StandardTestMethodforDeterminationofLowLevelsofPhosphorusinILSACGF4andSimilarGradeEngineOilsbyInductivelyCoupledPlasmaAtomicEmissionSpectrometry1ThisstandardisissuedunderthefixeddesignationD7040;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthequantitativedeterminationofphosphorusinunusedlubricatingoils,suchasInternationalLubricantStandardizationandApprovalCommittee(ILSAC)GF4andsimilargradeengineoils,byinductivelycoupledplasmaatomicemissionspectrometry.1.2Theprecisionstatementsarevalidfordilutionsinwhichthemass%sampleinsolventisheldconstantintherangeof1mass%to5mass%oil.1.3Theprecisiontablesdefinetheconcentrationrangescoveredintheinterlaboratorystudy(500mg⁄kgto800mg⁄kg).However,bothlowerandhigherconcentrationscanbedeterminedbythistestmethod.ThelowconcentrationlimitsaredependentonthesensitivityoftheICPinstrumentandthedilutionfactor.Thehighconcentrationlimitsaredeterminedbytheproductofthemaximumconcentrationdefinedbythelinearcalibrationcurveandthesampledilutionfactor.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4307PracticeforPreparationofLiquidBlendsforUseasAnalyticalStandardsD4927TestMethodsforElementalAnalysisofLubricantandAdditiveComponents—Barium,Calcium,Phosphorus,Sulfur,andZincbyWavelength-DispersiveX-RayFluorescenceSpectroscopyD4951TestMethodforDeterminationofAdditiveElementsinLubricatin...
