【英文标准名称】:StandardTestMethodforUraniumbyIron(II)ReductioninPhosphoricAcidFollowedbyChromium(VI)TitrationinthePresenceofVanadium
【原文标准名称】:使用铁(II)在磷酸中还原后在有钒的情况下滴定铬(VI)的铀标准试验方法
【标准号】:ASTMC1267-2011
【标准状态】:现行
【国别】:
【发布日期】:2011
【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】:(TestMethod)
【标准水平】:()
【中文主题词】:铀的铬滴定法;铀的戴维斯和格雷滴定法;铀的戴维斯和格雷改良滴定法;铀分析;燃料中的铀分析;产品中的铀分析
【英文主题词】:chromiumtitrationofuranium;DaviesandGraytitrationofuranium;ModifiedDaviesandGraytitrationofuranium;uraniumanalysis;uraniumanalysisinfuel;uraniumanalysisinproduct
【摘要】:Factorsgoverningselectionofamethodforthedeterminationofuraniumincludeavailablequantityofsample,homogeneityofmaterialsampled,samplepurity,desiredlevelofreliability,andfacilityavailableequipment.ThisuraniumassaymethodisreferencedintheTestMethodsforChemical,MassSpectrometric,andSpectrochemicalAnalysisofNuclear-GradeUraniumDioxidePowdersandPellets(TestMethodsC696)andintheTestMethodsforChemical,MassSpectrometric,andSpectrochemical,Nuclear,andRadiochemicalAnalysisofNuclear-GradeUranylNitrateSolutions(TestMethodsC799).Thisuraniumassaymethodmayalsobeusedforuraniumhexafluorideanduraniumoreconcentrate.Thistestmethoddetermines20to200mgofuranium;isapplicabletoproduct,fuel,andscrapmaterialafterthematerialisdissolved;istoleranttowardsmostmetallicimpurityelementsusuallyspecifiedinproductandfuel;andusesnospecialequipment.Theruggednessofthetitrationmethodhasbeenstudiedforboththevolumetric(6)andtheweight(7)titrationofuraniumwithdichromate.CommitteeC26SafeguardsStatement:Thematerials(nucleargradeuraniuminproduct,fuel,andscrap)towhichthistestmethodappliesaresubjecttonuclearsafeguardregulationsgoverningtheirpossessionanduse.TheanalyticalmethodinthisstandardmeetsU.S.DepartmentofEnergyguidelinesforacceptabilityofameasurementmethodforgenerationofsafeguardsaccountabilitymeasurementdata.Whenusedinconjunctionwiththeappropriatecertifiedreferencematerials(SRMorCRM),thisprocedurecandemonstratetraceabilitytothenationalmeasurementbase.However,useofthetestmethoddoesnotautomaticallyguaranteeregulatoryacceptanceoftheresultingsafeguardsmeasurements.Itremainsthesoleresponsibilityoftheuserofthistestmethodtoassurethatitsapplicationtosafeguardshastheapprovaloftheproperregulatoryauthorities.1.1Thistestmethod,commonlyreferredtoastheModifiedDaviesandGraytechnique,coversthetitrationofuraniuminproduct,fuel,andscrapmaterialsafterthematerialisdissolved.Thetestmethodisversatileandhasbeenruggednesstested.Withappropriatesamplepreparation,thistestmethodcangivepreciseandunbiaseduraniumassaysoverawidevarietyofmaterialtypes(1,2).DetailsofthetitrationprocedureinthepresenceofplutoniumwithappropriatemodificationsaregiveninTestMethodC1204.1.2Uraniumlevelstitratedareusually20to50mg,butupto200mguraniumcanbetitratedusingthereagentvolumesstatedinthistestmethod.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificsafeguardandsafetyprecautionstatements,seeSection4.
【中国标准分类号】:
【国际标准分类号】:27_120_30
【页数】:10P.;A4
【正文语种】: