【英文标准名称】:StandardTestMethodsforLowConcentrationsofDiethlyeneGlycolinEthyleneGlycolbyGasChromatography
【原文标准名称】:用气相色谱法对乙二醇中低浓度二甘醇的标准试验方法
【标准号】:ASTME611-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:E15.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:含量测定;试验;色谱法;化合物;二甘醇;乙二醇
【英文主题词】:diethylenegylcol;ethyleneglycol;gaschromatograph
【摘要】:Eithertestmethodmaybeusedtodeterminetheconcentrationsofdiethyleneglycolinethyleneglycol.Theconcentrationsofthecomponentsareobtainedbyanormalizationtechnique,basedontheassumptionthatallcomponentsareelutedundertheconditionsused.Ifallcomponentsshouldnotbeeluted,thecalculatedconcentrationswillbeerroneouslyhigh,withthemajorcomponentshowingthemostsignificantabsoluteerror.Sincewaterisnotdetectedbytheseprocedures,theresultsareonawater-freebasis.WatermaybedeterminedinaccordancewiththeapplicablesectionsofTestMethodsE202andthegaschromatographicresultscorrectedforthewaterconcentration.Bothtestmethodsarecurrentlyinindustrialuse.TestMethodAisthesimplerofthetwotestmethodsbecauseitdoesnotrequirethepreparationofderivativespriortogaschromatographicanalysis.TheresultsobtainedbyTestMethodAareslightlymoreaccuratethanthoseobtainedbyTestMethodB.Withrespecttoprecisionthereisnosignificantdifferencebetweenthetwotestmethods.TestMethodBhasbeenreportedtobesuitablealsofortheanalysisofawidevarietyofglycolethers,butthisuseisbeyondthescopeofthisstandard.1.1Thesetestmethodsareintendedprimarilyfortheanalysisofmixturesofethyleneanddiethyleneglycolsinwhichthediethyleneglycolconcentrationis0.1%orless.Bothtestmethodsshouldbeapplicabletohigherconcentrationsofdiethyleneglycol,butprecisionandbiasestimateshavebeenobtainedonlyfor0.05to0.1%diethyleneglycol.Note1TestMethodsE202describeanothergaschromatographictestmethodapplicabletomixturesofethylene,diethylene,andtriethyleneglycolsandmixturesofpropylene,dipropylene,andtripropyleneglycolsinwhichoneoftheglycolsistheprincipalcomponentandtheothertwoarepresentinconcentrationsof0.1to1%each.1.2Thetwotestmethodsaregivenasfollows:SectionsTestMethodA-NonderivativeMethod5to13TestMethodB-DerivativeMethod14to22