【英文标准名称】:StandardTestMethodforDeterminationofMetalsinLubricatingGreasesbyInductivelyCoupledPlasmaAtomicEmissionSpectrometry
【原文标准名称】:用感应耦合等离子体原子发射分光光谱测定法测定润滑脂中金属的标准试验方法
【标准号】:ASTMD7303-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:additiveelements;aluminum;antimony;barium;calcium;emissionspectrometry;grease;ICP;inductively-coupledplasmaemissionspectrometry;internalstandard;iron;lithium;lubricatinggrease;magnesium;molybdenum;phosphorus;silicon;sodium;sulfur;
【摘要】:Lubricatinggreasesareusedinalmostallbearingsusedinanymachinery.Lubricatinggreaseiscomposedof~90%additizedoilandsoaporotherthickeningagent.Thereareoveradozenmetallicelementspresentingreases,eitherblendedasadditivesforperformanceenhancementsorasthickeners,orinusedgreasespresentascontaminantsandwearmetals.Determiningtheirconcentrationscanbeanimportantaspectofgreasemanufacture.Themetalcontentcanalsoindicatetheamountofthickenersinthegrease.Additionally,areliableanalysistechniquecanalsoassistintheprocessoftroubleshootingproblemswithnewandusedgreaseinthefield.Althoughwidelyusedinothersectorsoftheoilindustryformetalanalysis,ICP-AESbasedTestMethodsD4951orD5185cannotbeusedforanalyzinggreasesbecauseoftheirinsolubilityinorganicsolventsusedinthesetestmethods.Hence,greasesamplesneedtobebroughtintoaqueoussolutionbyaciddecompositionbeforeICP-AESmeasurements.TestMethodD3340hasbeenusedtodeterminelithiumandsodiumcontentoflubricatinggreasesusingflamephotometry.Thistechniqueisnolongerwidelyused.Thisnewtestmethodprovidesatestmethodformulti-elementanalysisofgreasesamples.ThisisthefirstDO2standardavailableforsimultaneousmulti-elementanalysisoflubricatinggreases.1.1Thistestmethodcoversthedeterminationofanumberofmetalssuchasaluminum,antimony,barium,calcium,iron,lithium,magnesium,molybdenum,phosphorus,silicon,sodium,sulfur,andzincinunusedlubricatinggreasesbyinductivelycoupledplasmaatomicemissionspectrometry(ICP-AES)technique.1.1.1Therangeofapplicabilityforthistestmethod,basedontheinterlaboratorystudyconductedin2005,isaluminum(10-600),antimony(10-2300),barium(50-800),calcium(20-50000),iron(10-360),lithium(300-3200),magnesium(30-10000),molybdenum(50-22000),phosphorus(50-2000),silicon(10-15000),sodium(30-1500),sulfur(1600-28000),andzinc(300-2200),allinmg/kg.Lowerlevelsofelementsmaybedeterminedbyusinglargersampleweights,andhigherlevelsofelementsmaybedeterminedbyusingsmalleramountsofsampleorbyusingalargerdilutionfactoraftersampledissolution.However,thetestprecisioninsuchcaseshasnotbeendetermined,andmaybedifferentthantheonesgiveninTable1.1.1.2Itmayalsobepossibletodetermineadditionalmetalssuchasbismuth,boron,cadmium,chromium,copper,lead,manganese,potassium,titanium,etc.bythistechnique.However,notenoughdataisavailabletospecifytheprecisionfortheselatterdeterminations.Thesemetalsmayoriginateintogreasesthroughcontaminationorasadditiveelements.1.1.3Duringsamplepreparation,thegreasesamplesaredecomposedwithavarietyofacidmixture(s).Itisbeyondthescopeofthistestmethodtospecifyappropriateacidmixturesforallpossiblecombinationofmetalspresentinthesample.Butiftheashdissolutionresultsinanyvisibleinsolublematerial,thetestmethodmaynotbeapplicableforthetypeofgreasebeinganalyzed,assumingtheinsolublematerialcontainssomeoftheanalytesofinterest.1.2Elementspresentatconcentrationsabovetheupperlimitofthecalibrationcurvescanbedeterminedwithadditionalappropriatedilutionsofdissolvedsamplesandwithnodegradationofprecision.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationsp......
【中国标准分类号】:E36
【国际标准分类号】:75_100
【页数】:7P.;A4
【正文语种】: