ASTM D1681-2005 用阳离子滴定程序对洗涤剂中合成阴离子活性成分的标准试验方法

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【英文标准名称】:StandardTestMethodforSyntheticAnionicActiveIngredientinDetergentsbyCationicTitrationProcedure
【原文标准名称】:用阳离子滴定程序对洗涤剂中合成阴离子活性成分的标准试验方法
【标准号】:ASTMD1681-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D12.12
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;肥皂;活性物质;洗涤剂;抛光剂
【英文主题词】:
【摘要】:Thistestmethoddeterminesanionicdetergentscommonlyfoundinlaundry,dishwashing,andothercleaningmaterials.Accuratedeterminationoftheanionicactivesubstanceishighlyimportantinassessingthecostandeffectivenessofsuchcleaningsubstances.1.1Directtitrationofananionicsurfactantwithastandardizedcationicreagentisasimpleandconvenientmethodforthequantitativedeterminationofthecontentofactiveingredient.Theendpointisdetffectedbythetransferofacoloredcomplexfromanorganicsolventphasetoanaqueousphase.Therelationshipbetweenanionicandcationicagentsisnotalwaysstoichiometric,andformaximumaccuracytheanionictypeofinterestshouldfirstbecharacterizedandthenusedtostandardizethecationicreagent.Inmostcases,however,thedifferentanionicsurfactantslikelytobeencounteredreactinthesameproportions.Thatis,acationictitratingsolutionstandardizedagainstacharacterizedanionicagentcanbeusedtoanalyzeotheranionicsofknownmolecularweights.1.2Thistestmethodisapplicabletoalkylarylsulfonatesandfattyalkylsulfates.Lowresultsareobtainedwithalkylbenzenesulfonateshavingthealkylchainlengthlessthaneightcarbonatoms.Lowresultsarealsoobtainedforalkylsulfateswiththealkylchainlengthoflessthantwelvecarbonatoms.TheanionicsurfactantscharacterizedinaccordancewithSectionsshouldbethesodiumsaltandnotamine,ammonium,orpotassiumsalts.Incaseonlyamineorammoniumsaltsareavailable,theyshouldbefirstconvertedtothesodiumsaltbeforeproceedingwiththisanalysis.1.3Theanalyticalproceduresappearinthefollowingorder:SectionsSeparationofAlcohol-SolubleMatter8and9SeparationofOil-FreeSulfonate10and11DeterminationofSodiumChloride(NaCl)Content12-17CharacterizationofAnionicSurfactantStandard:PartI.DeterminationofSurfactant,SO3Content,andSolutionMolarity18-20PartII.DeterminationofSurfactant,SO3andActiveIngredientContentsCombiningWeight,andSolutionMolarity21-24StandardizationofCationicReagent25-29QuantitativeDeterminationofAnionicSurfactantbyCationicTitration30-33