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【英文标准名称】:StandardTestMethodforTraceImpuritiesinMonocyclicAromaticHydrocarbonsbyGasChromatographyandExternalCalibration
【原文标准名称】:用气相色谱法和外部校准法对单环芳香烃中微量杂质的标准试验方法
【标准号】:ASTMD5917-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:D16.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:化工技术;芳烃;杂质;气相色谱法;测试
【英文主题词】:aromatics;externalstandard;gaschromatography;impurities;purity;toluene;xylenes
【摘要】:Determiningthetypeandamountofhydrocarbonimpuritiesremainingfromthemanufactureoftoluene,mixedxylenes,andp-xylenesusedaschemicalintermediatesandsolventsisoftenrequired.Thistestmethodissuitableforsettingspecificationsandforuseasaninternalqualitycontroltoolwheretheseproductsareproducedorareused.Typicalimpuritiesare:alkanescontaining1to10carbonsatoms,benzene,toluene,ethylbenzene(EB),xylenes,andaromatichydrocarbonscontainingninecarbonatoms.5.1.1RefertoTestMethodD2306fordeterminingtheC8aromatichydrocarbondistributioninmixedxylenes.Purityiscommonlyreportedbysubtractingthedeterminedexpectedimpuritiesfrom100.00.However,agaschromatographicanalysiscannotdetermineabsolutepurityifunknownorundetectedcomponentsarecontainedwithinthematerialbeingexamined.ThistestmethodissimilartoTestMethodD2360,however,interlaboratorytestinghasindicatedabiasmayexistbetweenthetwomethods.Thereforetheuseriscautionedthatthetwomethodsmaynotgivecomparableresults.1.1Thistestmethodcoversthedeterminationofthetotalnonaromatichydrocarbonsandtracemonocyclicaromatichydrocarbonsintoluene,mixedxylenes,andp-xylenesbygaschromatography.Thepurityoftoluene,mixedxylenes,orp-xylenescanalsobecalculated.Calibrationofthegaschromatographicsystemisdonebytheexternalstandardcalibrationtechnique.Asimilartestmethod,usingtheinternalstandardcalibrationtechnique,isTestMethodD2360.1.2Totalaliphatichydrocarbonscontaining1through10carbonatoms(methanethroughdecanes)canbedetectedbythistestmethodatconcentrationsrangingfrom0.001to2.500weight%.1.2.1Asmallamountofbenzeneinmixedxylenesorp-xylenesmaynotbedistinguishedfromthenonaromaticsandtheconcentrationsaredeterminedasacomposite(see6.1).1.3Monocyclicaromatichydrocarbonimpuritiescontaining6through10carbonatoms(benzenethroughC10aromatics)canbedetectedbythistestmethodatindividualconcentrationsrangingfrom0.001to1.000weight%.1.4Thefollowingappliestoallspecifiedlimitsinthistestmethod:forpurposesofdeterminingconformancewiththistestmethod,anobservedvalueoracalculatedvalueshallberoundedoff"tothenearestunit"inthelastright-handdigitusedinexpressingthespecificationlimit,inaccordancewiththerounding-offmethodofPracticeE29.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatement,seeSection9.
【中国标准分类号】:G17
【国际标准分类号】:71_040_50;71_080_15
【页数】:8P.;A4
【正文语种】:


【英文标准名称】:Opticalemissionspectrometry(OES)-Part1:Termsforsystemswithsparksandlowpressuredischarges
【原文标准名称】:发射光谱测定分析(OES).火花和低压放电系统术语
【标准号】:DIN51008-1-2004
【标准状态】:现行
【国别】:德国
【发布日期】:2004-05
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:分析方法;光学试验;光学测量;火焰光度测定法;发射分光光度测定法;等离子体;辉光放电;火焰;发射光谱分析;OES;光谱分析;光谱学;光谱化学分析;术语;分光光度法;火花放电;试验;放电;材料;词汇;材料试验;光学的;英语;定义
【英文主题词】:
【摘要】:ThestandardspecifiestermsforsystemswithsparksandglowdischargesusedforOpticalatomicemissionspectralanalysis(OES).
【中国标准分类号】:G04
【国际标准分类号】:71_040_50;01_040_71
【页数】:37P;A4
【正文语种】:德语