ASTM E203-2008 用卡尔费休试剂检验水的标准试验方法

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【英文标准名称】:StandardTestMethodforWaterUsingVolumetricKarlFischerTitration
【原文标准名称】:用卡尔费休试剂检验水的标准试验方法
【标准号】:ASTME203-2008
【标准状态】:现行
【国别】:美国
【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】:E15.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:freewater;KarlFischerreagent;pyridine-free;volumetric;water;waterofhydration;KarlFischerreagentmethod--watercontent;Liquids--laboratoryapplications;Organiccompounds--water;Solidphasematerials;Watercontent--chemicals
【摘要】:TitrationtechniquesusingKFreagentareoneofthemostwidelyusedforthedeterminationofwater.AlthoughthevolumetricKFtitrationcandeterminelowlevelsofwater,itisgenerallyacceptedthatcoulometricKFtitrations(seeTestMethodE1064)aremoreaccurateforroutinedeterminationofverylowlevelsofwater.Asageneralrule,ifsamplesroutinelycontainwaterconcentrationsof500mg/kgorless,thecoulometrictechniqueshouldbeconsidered.Applicationscanbesubdividedintotwosections:(1)organicandinorganiccompounds,inwhichwatermaybedetermineddirectly,and(2)compounds,inwhichwatercannotbedetermineddirectly,butinwhichinterferencesmaybeeliminatedbysuitablechemicalreactionsormodificationsoftheprocedure.FurtherdiscussionofinterferencesisincludedinSection5andAppendixX2.Watercanbedetermineddirectlyinthepresenceofthefollowingtypesofcompounds:OrganicCompounds
Acetals
Ethers
Acids(Note1)
Halides
Acylhalides
Hydrocarbons(saturatedandunsaturated)
Alcohols
Ketones,stable(Note4)
Aldehydes,stable(Note2)
Nitriles
Amides
Orthoesters
Amines,weak(Note3)
Peroxides(hydro,dialkyl)
Anhydrides
Sulfides
Disulfides
Thiocyanates
Esters
Thioesters
InorganicCompounds
Acids(Note5)
Cupricoxide
Acidoxides(Note6)
Desiccants
Aluminumoxides
Hydrazinesulfate
Anhydrides
Saltsoforganicandinorganicacids(Note6)
Bariumdioxide

Calciumcarbonate