【英文标准名称】:StandardTestMethodforDeterminationofAntioxidantsandErucamideSlipAdditivesinPolyethyleneUsingLiquidChromatography(LC)
【原文标准名称】:用液相色谱法(LC)测定聚乙烯中抗氧化剂和ErucamideSlip添加剂的标准试验方法
【标准号】:ASTMD6953-2003
【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】:D20.70
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:抗氧化剂;添加剂;聚乙烯;液相色谱法;测定;滑动
【英文主题词】:additive;antioxidants;erucamideslip;extraction;polyethylene
【摘要】:Separationandidentificationofstabilizersusedinthemanufactureofpolyethyleneresinsarenecessaryinordertocorrelateperformancepropertieswithpolymercomposition.ThistestmethodprovidesameanstodetermineBHT,BHEB,Isonox129,erucamideslip,Irgafos168,Irganox1010,Irganox1076andTNPPlevelsinpolyethylenesamples.ThistestmethodshouldbeapplicableforthedeterminationofotherantioxidantssuchasUltranox626,Ethanox330,SantanoxR,andTopanolCA,butthestabilityoftheseduringextractionhasnotbeeninvestigated.Theadditiveextractionprocedureismadeeffectivebytherelativelylowsolubilityofthepolymersampleinsolventsgenerallyusedforliquidchromatographicanalysis.Inthismethod,isopropanolandcyclohexanewerechosenbecauseoftheirexcellentextractionefficienciesaswellasforsafetyreasons.Othersolventsincludingethylacetate,isobutanol,chloroformandmethylenechloridecanalsobeused.Methodsotherthanrefluxingthathavebeenusedtoremoveadditivesfromthepolymermatrixincludemicrowave,ultrasonic,andsupercriticalfluidextractions.Fortheseparationoftheextractedadditives,SFCandGChavebeenusedsuccessfullyforseveraloftheadditives.Underoptimumconditions,thelowestlevelofdetectionforanantioxidantisapproximately2ppm.1.1Thistestmethodcoversaliquid-chromatographicprocedurefortheseparationofsomeadditivescurrentlyusedinpolyethylene.Theseadditivesareextractedwitheitherisopropanol(resindensities60;0.94g/cm3)orcyclohexane(resindensities62;0.94g/cm3)priortoliquid-chromatographicseparation.Theultravioletabsorbanceoftheelutingcompound(s)ismeasuredandquantitationisperformedusingexternalcalibration.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSection9.Note18212;ThereisnoequivalentISOstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_040_20
【页数】:6P.;A4
【正文语种】: