BS 6057-3.9-1996 橡胶胶乳.试验方法.pH值测定

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【英文标准名称】:Rubberlatices-Methodsoftest-DeterminationofpH
【原文标准名称】:橡胶胶乳.试验方法.pH值测定
【标准号】:BS6057-3.9-1996
【标准状态】:现行
【国别】:英国
【发布日期】:1996-10-15
【实施或试行日期】:1996-10-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:化学分析和测试;测定;分散作用(化学);实验室器具;胶乳;材料测试;pH值;pH值测定;塑料;高聚物;试剂;橡胶;试验报告
【英文主题词】:Chemicalanalysisandtesting;Determination;Dispersions(chemical);Laboratoryapparatus;Latices;Materialstesting;pH;pHmeasurement;Plastics;Polymers;Reagents;Rubber;Testreports
【摘要】:ThisInternationalStandardspecifiesamethodforthedeterminationofthepHofpolymerdispersionsandrubberlatices(naturalandsynthetic)bymeansofapH-meterequippedwithacombinedglassandsilverreferenceelectrode.Themethodisalsosuitableforprevulcanizedlatexandcompoundscontainingpolymerdispersionsorrubberlatices,includingadhesives.NOTE1TheaccuracyofthemethoddecreasesatpHvaluesabove11.UsersshouldnotethatthiseditionofISO976notonlyrepresentsarevisionofthepreviousedition,butalsosupersedesISO1148:1980,Plastics—Aqueousdispersionsofpolymersandcopolymers—Determi-nationofpH.Thiseditionrepresentsaharmonizedversionofthetwostandards.OneofthemajorchangesinthisneweditionofISO976istheuseofacombinedelectroderatherthantheseparateelectrodesusedinthepreviousedition,thecombinedelectrodebeingconsideredsuperiortotheseparateelectrodessincethelatterarepronetolatexdepositsblockingtheelectro-lytejunction,thusadverselyaffectingrepeatability.Althougholder-typetwinelectrodesarecapableofgivingaccurateresults,theyshouldbeprogressivelyreplacedbecauseofthisproblemofcleaningandrepeatability.
【中国标准分类号】:B72;G35
【国际标准分类号】:83_040_10
【页数】:12P.;A4
【正文语种】:英语