ASTM D7057-2009 气相色谱法分析异丙基苯的标准试验方法

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【英文标准名称】:StandardTestMethodforAnalysisofIsopropylbenzene(Cumene)byGasChromatography(ExternalStandard)
【原文标准名称】:气相色谱法分析异丙基苯的标准试验方法
【标准号】:ASTMD7057-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D16.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:alpha-methylstyrene;analysisbygaschromatography;benzene;butylbenzene;cumene;cymene;diisopropylbenzene;ethylbenzene;isopropylbenzene;methylcumene;nonaromatichydrocarbons;propylbenzene;toluene;Aromatichydrocar
【摘要】:Thistestmethodissuitableforsettingspecificationsonthematerialsreferencedin1.2andforuseasaninternalqualitycontroltoolwhereisopropylbenzeneisproducedorisusedinamanufacturingprocess.Itmayalsobeusedindevelopmentorresearchworkinvolvingisopropylbenzene.Thistestmethodisusefulindeterminingthepurityofisopropylbenzenewithnormalimpuritiespresent.Ifextremelyhighboilingorunusualimpuritiesarepresentintheisopropylbenzene,thistestmethodwouldnotnecessarilydetectthemandthepuritycalculationwouldbeerroneous.Cumenehydroperoxide,ifpresent,willyieldthermaldecompositionproducts,primarilyAPandDMPCasstatedin4.1,thatwilleluteinthechromatogramtherebygivingincorrectresultsunlesstheyareexcludedasindicatedin4.1.Itisalsopossibletogeterroneousresultsfortracealpha-methylstyrenepresentinisopropylbenzeneiftheinlethasbecomeundulycontaminatedwithnon-volatileforeignsubstances.Thenonaromatichydrocarbonscommonlypresentfromtheisopropylbenzenemanufacturingprocess,particularlyanon-zeoliticone,willinterferewiththedeterminationofxylenes(ifpresent).1.1Thistestmethodcoversthedeterminationofthepurityofisopropylbenzene(cumene)bygaschromatography.Calibrationofthegaschromatographysystemisdonebytheexternalstandardcalibrationtechnique.1.2Thistestmethodhasbeenfoundapplicabletothemeasurementofimpuritiessuchasnonaromatichydrocarbons,benzene,toluene,ethylbenzene,phenol,cymenes,t-butylbenzene,n-butylbenzene,n-propylbenzene,alpha-methylstyrene,sec-butylbenzene,anddiisopropylbenzenes,whichareimpuritiesthatcanbefoundinisopropylbenzene.Thelatterimpuritiescanbeanalyzedoverarangeof1mg/kgto500mg/kgbythismethod(seeTable1).ThelimitofdetectionfortheseimpuritiesissummarizedinTable1aswell.1.3Indeterminingtheconformanceofthetestresultsusingthismethodtoapplicablespecifications,resultsshallberoundedoffinaccordancewiththerounding-offmethodofPracticeE29.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection8.TABLE1SummaryofPrecisionData(mg/kg)CompoundRepeatabilityReproducibilityRangeStudiedBenzene
1.004+0.006*Benzene
0.924+0.158*Benzene
1.0x2013;295
Toluene
0.644+0.009*Toluene
1.505+0.069*Toluene
0.2x2013;260
Ethylbenzene(EB)
1.249+0.022*EB