【英文标准名称】:Plastics-Determinationofwatercontent
【原文标准名称】:塑料水含量的测定
【标准号】:ISO15512-1999
【标准状态】:作废
【国别】:国际
【发布日期】:1999-07
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC61
【标准类型】:()
【标准水平】:()
【中文主题词】:试验设备;塑料;卡耳费瑟方法;含量测定;水;测定;测压法;含水量;测试;物理试验
【英文主题词】:Determination;Determinationofcontent;Evaporation;Extraction;Extractionmethodsofanalysis;Granulates;KarlFischermethod;Manometric;Manometricmethod;Manometry;Physicaltesting;Plastics;Plasticsproducts;Testequipment;Testing;Water;Watercontent
【摘要】:1ThisInternationalStandardspecifiesmethodsforthedeterminationofthewatercontentofplasticsintheformofgranulesandfinishedarticles.Thesemethodsdonottestforwaterabsorption(kineticsandequilibrium)ofplasticsasmeasuredbyISO62.Themethodsaresuitableforthedeterminationofwatercontentaslowasthefollowinglevels:—MethodA0,1%orbetter;—MethodB0,01%orbetter;—MethodC0,01%orbetter.Watercontentisanimportantparameterforprocessingmaterials,andshouldremainbelowthelevelspecifiedintheappropriatematerialstandard.2ThreealternativemethodsarespecifiedinthisInternationalStandard.a)MethodAisanextractionmethodusinganhydrousmethanolfollowedbyaKarl-Fischertitrationoftheextractedwater.Itcanbeusedforallplasticsandisapplicabletogranuleshavingamaximumsizeof4mm×4mm×3mm.b)MethodBisavaporizationmethodusingheated,dryairornitrogengastoevaporatethewater,followedbyaKarl-Fischertitrationofthecollectedwater.Itcanbeusedforallplasticsandisapplicabletogranulessmallerthan4mm×4mm×3mm.c)MethodCisamanometricmethod.Thewatercontentisdeterminedfromtheincreaseinpressurewhichresultswhenthewaterisevaporatedunderavacuum.Thismethodisnotapplicabletoplasticsamplescontainingvolatilecompounds,otherthanwater,inamountscontributingsignificantlytothevapourpressureatroomtemperature.Checksforthepresenceoflargeamountsofvolatilecompoundsshouldbecarriedoutperiodically,forexamplebygaschromatography.Suchchecksareparticularlyrequiredfornewtypesorgradesofmaterial.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:12P;A4
【正文语种】:英语