ASTM E1746-2008 气体杂质测定用液态氯取样及分析的标准试验方法

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【英文标准名称】:StandardTestMethodforSamplingandAnalysisofLiquidChlorineforGaseousImpurities
【原文标准名称】:气体杂质测定用液态氯取样及分析的标准试验方法
【标准号】:ASTME1746-2008
【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】:E15.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:analysis;carbondioxide;carbonmonoxide;gaschromatography;hydrogen;inertgases;liquidchlorine;nitrogen;oxygen;Carbondioxidecontent;Carbonmonoxide(CO);Gaschromatography(GC)--atmosphericanalysis/gases;Gaseousenvironments;Impuri
【摘要】:Itisverydifficulttoexcludesamplecontaminationbyambientairduringtheprocessofsampling.Thelevelsofatmosphericcontaminationcausedbypoorsamplingmethodsareoftenequaltoorlargerthanthelevelsofthegaseousimpuritiespresentinthechlorine.Thisresultsinmarkedlyelevatedlevelsofdetectedimpurities.Asspecificationsbecometighter,itbecomesmoreimportanttomeasurethegaseousimpuritylevelsinliquidchlorinecorrectly.Additionalproblemsareexperiencedinthesamplingofliquefiedgasesforthegaseousimpurities.Thegaseousimpuritiesreachanequilibriumbetweentheliquidphaseandvaporphaseinasamplebomb.Thequantityofgasesmeasuredinanyparticularsamplecontainingbothliquidandvaporwillbeafunctionoftheamountofvaporspaceinthesamplebomb.Thistestmethodavoidsthepresenceofliquidinthesamplebomb.1.1Thistestmethodcoverssamplingandanalysisofliquidchlorineforthedeterminationofoxygen(200to400x03BC;g/g),nitrogen(400to800x03BC;g/g),andcarbondioxide(800to1000ppm)contentatlevelsnormallyseeninliquidchlorine.Hydrogenandcarbonmonoxideconcentrationsinliquidchlorinearetypicallyatorbelowthedetectionlimitofthistestmethod.Note18212;Theminimumdetectionlimitofhydrogenusinga1cm3gassampleandargoncarriergasis100to200x03BC;g/g.Thedetectionlimitfortheothercomponentsissignificantlylower.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3ReviewthecurrentMaterialSafetyDataSheets(MSDS)fordetailedinformationconcerningtoxicity,firstaidprocedures,andsafetyprecautions.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecifichazardsstatementsaregiveninSection7.
【中国标准分类号】:G13
【国际标准分类号】:71_060_10
【页数】:7P.;A4
【正文语种】:英语