【英文标准名称】:StandardTestMethodforTraceImpuritiesinMonocyclicAromaticHydrocarbonsbyGasChromatography
【原文标准名称】:用气相色谱法测定单环芳烃中微量杂质的标准试验方法
【标准号】:ASTMD2360-2008
【标准状态】:现行
【国别】:
【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】:D16.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:芳族化合物;芳烃;色谱法;烃类;杂质;油性涂料;涂料;溶剂;测试
【英文主题词】:impurities;purity;toluene;xylenes;Benzene--paints/relatedcoatings/materials;Gaschromatography(GC)--paints/relatedcoatings/materials;Hydrocarboncontent--nonaromatic;Traceelements--paints/relatedcoatings/materials;Monocyclicaromatichydrocar
【摘要】:Thedeterminationofhydrocarbonimpuritiescontainedintolueneandmixedxylenesusedaschemicalintermediatesandsolventsistypicallyrequired.Thistestissuitableforsettingspecificationsandforuseasaninternalqualitycontroltoolwherearomaticmonocyclichydrocarbonsareproducedorareused.Thistestmethodisapplicablefordeterminingtheimpuritiesfromthearomatichydrocarbonproductionprocess.Typicalimpuritiesarealkanescontaining1to10carbonatoms,benzene,toluene,ethylbenzene(EB),xylenes,andaromatichydrocarbonscontainingninecarbonatoms.RefertoTestMethodsD3797,D3798,andD4492fordeterminingthepurityofo-Xylene,p-Xylene,andbenzene,respectively.RefertoTestMethodD6563fordeterminingtheC8aromatichydrocarbondistributioninmixedxylenes.Purityiscommonlyreportedbysubtractingthedeterminedexpectedimpuritiesfrom100.00.However,agaschromatographicanalysiscannotdetermineabsolutepurityifunknownorundetectedcomponentsarecontainedwithinthematerialbeingexamined.1.1Thistestmethodcoversthedeterminationofthetotalnonaromatichydrocarbons,andtracemonocyclicaromatichydrocarbonsinthepurityoftolueneandmixedxylenesbygaschromatography.1.2Nonaromaticaliphatichydrocarbonscontaining1through10carbonatoms(methanethroughdecanes)canbedetectedbythistestmethodatconcentrationsrangingfrom0.001%to2.500weight%.1.2.1Asmallamountofbenzeneinmixedxylenesmaynotbedistinguishedfromthenonaromaticsandtheconcentrationsaredeterminedasacomposite.1.3Monocyclicaromatichydrocarbonimpuritiescontaining6through9carbonatoms(benzenethroughC9aromatics)canbedetectedbythistestmethodatindividualconcentrationsrangingfrom0.001%to1.000weight%.1.4Indeterminingtheconformanceofthetestresultsusingthismethodtoapplicablespecifications,resultsshallberoundedoffinaccordancewiththerounding-offmethodofPracticeE29.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G17
【国际标准分类号】:71_080_15
【页数】:5P.;A4
【正文语种】:


【英文标准名称】:Testmethodsforperformanceandaccuracyofroutingmachines
【原文标准名称】:镂铣机的试验及检验方法
【标准号】:JISB6511-1989
【标准状态】:作废
【国别】:日本
【发布日期】:1989-03-01
【实施或试行日期】:1989-03-01
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:GeneralMachinery
【标准类型】:()
【标准水平】:()
【中文主题词】:特形铣床;准确度;木工机械;性能试验
【英文主题词】:woodworkingmachines;accuracy;performancetesting;routingmachines
【摘要】:
【中国标准分类号】:J60
【国际标准分类号】:79_120_10
【页数】:8P;A4
【正文语种】:日语