ISO 2271:1989 表面活性剂.洗涤剂.用人工或机械动力直接双相滴定法测定阴离子活性物质

标准编号：ISO 2271:1989

中文名称：表面活性剂.洗涤剂.用人工或机械动力直接双相滴定法测定阴离子活性物质

英文名称：Surface active agents — Detergents — Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure

发布日期：1989-10

标准范围

在由水相和氯仿相组成的介质中，在含有阳离子染料（溴化二亚胺）和阴离子染料（酸性蓝1）混合物的指示剂存在下，用标准体积阳离子活性溶液（氯化苯乙铵）滴定，测定该物质。该方法适用于活性物质的固体或水溶液。必须知道阴离子活性物质的相对分子质量。如果存在阳离子表面活性剂，则该方法不适用。

The substance is determined in a medium consisting of an aqueous and a chloroform phase by titration with a standard volumetric cationic-active solution (benzethonium- chloride) in the presence of an indicator which consists of a mixture of cationic dye (dimidium bromide) and an anionic dye (acid blue 1). The method is applicable to solids or to aqueous solutions of the active material. The relative molecular mass of the anionic active matter has to be known. The method is not applicable if cationic surface active agents are present.

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