【英文标准名称】:StandardTestMethodforSamplingandAnalysisofLiquidChlorineforGaseousImpurities
【原文标准名称】:液态氯其他杂质取样和分析的标准试验方法
【标准号】:ASTME1746-1995(2001)e1
【标准状态】:现行
【国别】:
【发布日期】:1995
【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】:E15.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:杂质;液氯;气体的;试验方法
【英文主题词】:analysis;carbondioxide;carbonmonoxide;gaschromatography;hydrogen;inertgases;liquidchlorine;nitrogen;oxygen
【摘要】:Itisverydifficulttoexcludesamplecontaminationbyambientairduringtheprocessofsampling.Thelevelsofatmosphericcontaminationcausedbypoorsamplingmethodsareoftenequaltoorlargerthanthelevelsofthegaseousimpuritiespresentinthechlorine.Thisresultsinmarkedlyelevatedlevelsofdetectedimpurities.Asspecificationsbecometighter,itbecomesmoreimportanttomeasurethegaseousimpuritylevelsinliquidchlorinecorrectly.Additionalproblemsareexperiencedinthesamplingofliquefiedgasesforthegaseousimpurities.Thegaseousimpuritiesreachanequilibriumbetweentheliquidphaseandvaporphaseinasamplebomb.Thequantityofgasesmeasuredinanyparticularsamplecontainingbothliquidandvaporwillbeafunctionoftheamountofvaporspaceinthesamplebomb.Thistestmethodavoidsthepresenceofliquidinthesamplebomb.1.1Thistestmethodcoverssamplingandanalysisofliquidchlorineforthedeterminationofoxygen(200to400ppm),nitrogen(400to800ppm),andcarbondioxide(800to1000ppm)contentatlevelsnormallyseeninliquidchlorine.Hydrogenandcarbonmonoxideconcentrationsinliquidchlorinearetypicallyatorbelowthedetectionlimitofthistestmethod.Note1-Theminimumdetectionlimitofhydrogenusinga1cmgassampleandargoncarriergasis100to200ppm.Thedetectionlimitfortheothercomponentsissignificantlylower.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecifichazardsstatementsaregiveninSection7.1.3ReviewthecurrentMaterialSafetyDataSheets(MSDS)fordetailedinformationconcerningtoxicity,firstaidprocedures,andsafetyprecautions.
【中国标准分类号】:A43
【国际标准分类号】:71_060_10
【页数】:7P.;A4
【正文语种】: