作者:标准资料网 时间:2024-05-18 20:08:38   浏览:8751   来源:标准资料网

【英文标准名称】:StandardTestMethodsforChemical,MassSpectrometric,andSpectrochemicalAnalysisofNuclear-GradeBoronCarbide
【原文标准名称】:核纯级碳化硼的化学、质谱和光谱化学化学分析的标准试验方法
【标准号】:ASTMC791-2004
【标准状态】:现行
【国别】:
【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】:C26.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:化学分析和试验;硼;分析;光谱化学分析;核能;光谱测定法;核技术;碳化物
【英文主题词】:
【摘要】:Boroncarbideisusedasacontrolmaterialinnuclearreactors.Inordertobesuitableforthispurpose,thematerialmustmeetcertaincriteriaforassay,isotopiccomposition,andimpuritycontent.ThesemethodsaredesignedtoshowwhetherornotagivenmaterialmeetsthespecificationsfortheseitemsasdescribedinSpecificationsC750andC751.3.1.1Anassayisperformedtodeterminewhetherthematerialhasthespecifiedboroncontent.3.1.2Determinationoftheisotopiccontentoftheboronismadetoestablishwhetherthecontentisincompliancewiththepurchaserrsquo;specifications.3.1.3Impuritycontentisdeterminedtoensurethatthemaximumconcentrationlimitofcertainimpurityelementsisnotexceeded.1.1Thesetestmethodscoverproceduresforthechemical,massspectrometric,andspectrochemicalanalysisofnuclear-gradeboroncarbidepowderandpelletstodeterminecompliancewithspecifications.1.2Theanalyticalproceduresappearinthefollowingorder:SectionsTotalCarbonbyCombustionandGravimetry7-17TotalBoronbyTitrimetry18-28IsotopicCompositionbyMassSpectrometry29-38ChlorideandFluorideSeparationbyPyrohydrolysis39-45ChloridebyConstant-CurrentCoulometry46-54FluoridebyIon-SelectiveElectrode55-63WaterbyConstant-VoltageCoulometry64-72ImpuritiesbySpectrochemicalAnalysis73-81SolubleBoronbyTitrimetry82-95SolubleCarbonbyaManometricMeasurement96-105MetallicImpuritiesbyaDirectReaderSpectrometricMethod106-114