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【英文标准名称】:StandardPracticeforAlternateActinideCalibrationforInductivelyCoupledPlasma-MassSpectrometry
【原文标准名称】:电感耦合等离子体质谱法的交替锕系校正的标准实施规程
【标准号】:ASTMC1590-2004(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:C26.05
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:actinides;inductivelycoupledplasma-massspectrometry(ICP-MS);massbias;thorium;uranium;Actinides;ICP-MS(inductively-coupledplasma-massspectrometry);Thorium;Uranium
【摘要】:Oneofthebenefitsofthisstandardpracticeistheabilitytocalibratefortheanalysisofhighlyradioactiveactinidesusingcalibrationstandardsatmuchlowerspecificactivities(thatis,232Thand238U).Environmentallaboratoriesmayfindthisstandardpracticeusefuliffacilitiesarenotavailabletohandlethehighlyradioactivestandardsoftheindividualactinidesofinterest.Thedegreeofactualmassbiasisvariableandisdependentuponinstrumenttuneparameters.Thisstandardpracticeusesuniversalinterferenceequationstoderiveamassbiascorrectionthatisspecifictotheinstrumentparametersandtuneusedforsampledataacquisitionandnotbasedonahistoricalaverage.Massbiascorrectionusestheinstrumentsoftwareinterferenceequationsanddoesnotrequireadditionalsubsequentoff-linecalculations.Themethodologythatthisstandardpracticeisbasedonhasbeenusedforthedeterminationof232Thand237Npinenricheduraniumsolutionsandthedeterminationof241Aminplutoniumanduraniumlegacyoxidesfollowingdissolutionandionextractionchromatographyseparation.1.1ThispracticeprovidesguidanceforanalternatelinearcalibrationforthedeterminationofselectedactinideisotopesinappropriatelypreparedaqueoussolutionsbyInductivelyCoupledPlasma-MassSpectrometry(ICP-MS).Thisalternatecalibrationismassbiasadjustedusingthorium-232(232Th)anduranium-238(238U)standards.Oneofthebenefitsofthisstandardpracticeistheabilitytocalibratefortheanalysisofhighlyradioactiveactinidesusingcalibrationstandardsatmuchlowerspecificactivities.Environmentallaboratoriesmayfindthisstandardpracticeusefuliffacilitiesarenotavailabletohandlethehighlyradioactivestandardsoftheindividualactinidesofinterest.1.2Theinstrumentresponseforaseriesofdeterminationsofknownconcentrationof232Thand238Udefinesthemassversusresponserelationship.Foreachstandardconcentration,theslopeofthelinedefinedby232Thand238Uisusedtoderivelinearcalibrationcurvesforeachmassofinterestusinginterferenceequations.Themassbiascorrectedcalibrationcurves,althoughgeneratedfrominterferenceequations,arespecifictotheinstrumentoperatingparametersandtuningineffectatthetimeofdataacquisition.BecauseinterferenceequationsarepartofthenormalICP-MSmanufacturer''ssoftwarepackage,thiscalibrationmethodologyiswidelyapplicable.1.3Forthisstandardpractice,theactinideatomicmassrangethathasbeenstudiedisfromamu232x2013;244.Guidanceforanextendedrangeofamu228x2013;248isgiveninthispractice.1.4Usingthispractice,analyteconcentrationsarereportedateachamuandnotbyelementtotal(thatis,239Puversusplutonium).1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A43
【国际标准分类号】:71_040_50
【页数】:6P.;A4
【正文语种】:英语