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【英文标准名称】:StandardPracticeforTestingHomogeneityofaMetalLotorBatchinSolidFormbySparkAtomicEmissionSpectrometry
【原文标准名称】:采用火花原子发射光谱法的固态同规格金属同质性检验的标准实施规程
【标准号】:ASTME826-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:E01.22
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:atomicemissionspectroscopy;homogeneity;referencematerials;Flameemissionspectroscopy;Homogeneity;Instrumentalmeasurement--spectrochemical;Metalsandmetallicmaterials;Opticalemissionspectrometry(OES);Referencesamples/specimens;Spectral
【摘要】:Thepurposeofthispracticeistoevaluatethehomogeneityofalotofmaterialselectedasacandidatefordevelopmentasareferencematerialorcertifiedreferencematerial,orforaL/Bselectedforsomeotherpurpose(seeAppendixX1-AppendixX4forexamples).Thispracticeisapplicabletothetestingofsamplestakenatvariousstagesduringproduction.Forexample,continuouscastmaterials,ingots,rolledbars,wire,etc.,couldbesampledatvariousstagesduringtheproductionprocessandtested.1.1Thispracticeissuitablefortestingthehomogeneityofametallotorbatch(L/B)insolidformbysparkatomicemissionspectrometry(Spark-AES).ItiscompliantwithISOGuide35x2014;CertificationofReferenceMaterials:GeneralandStatisticalPrinciples.ItisprimarilyintendedforuseinthedevelopmentofreferencematerialsbutmaybeusedinanyotherapplicationwhereaL/Bistobetestedforhomogeneity.Itisdesignedtoprovideacombinedstudyofwithin-unitandbetween-unithomogeneityofsuchaL/B.1.2ThispracticeisdesignedprimarilytotestforelementalhomogeneityofametalL/BbySpark-AES.However,itcanbeadaptedforusewithotherinstrumentaltechniquessuchasX-rayfluorescencespectrometry(XRF)oratomicabsorptionspectrometry(AAS).Note18212;Thispracticeisnotlimitedtoelementalanalysisortechniques.Thispracticecanbeappliedtoanypropertythatcanbemeasured,forexample,thepropertyofhardnessasmeasuredbytheRockwelltechnique.1.3Thecriteriaforacceptanceofthetestspecimensmustbepreviouslydetermined.Thatis,themaximumacceptablelevelofheterogeneitymustbedeterminedonthebasisoftheintendeduseoftheL/B.1.4ItisassumedthattheanalystistrainedinSpark-AEStechniquesincludingthespecimenpreparationproceduresneededtomakespecimensreadyformeasurements.Itisfurtherassumedthattheanalystisversedinandhasaccesstocomputer-baseddatacaptureandanalysis.Themethodologyofthispracticeisbestutilizedinacomputerbasedspreadsheet.1.5Thispracticecanbeappliedtooneormoreelementsinaspecimenprovidedthesignal-to-backgroundratioisnotalimitingfactor.1.6Thispracticeincludesmethodstocorrectforsystematicdriftoftheinstrumentwithtime.(Warning8212;Ifdriftoccurs,erroneousconclusionswillbeobtainedfromthedataanalysis.)1.7Thispracticealsoincludesmethodstorefineestimatesofcompositionanduncertaintythroughtheuseofatypestandardormultiplecalibrants.1.8Itfurtherprovidesameansofreducinganonhomogeneoussettoahomogeneoussubset.1.9Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H10
【国际标准分类号】:77_040_99
【页数】:27P.;A4
【正文语种】:英语