ISO 6845:1989 表面活性剂.工业烷基磺酸盐.烷基单磺酸盐平均相对分子量和烷基单磺酸盐含量的测定

标准编号：ISO 6845:1989

中文名称：表面活性剂.工业烷基磺酸盐.烷基单磺酸盐平均相对分子量和烷基单磺酸盐含量的测定

英文名称：Surface active agents — Technical alkane sulfonates — Determination of the mean relative molecular mass of the alkane monosulfonates and the alkane monosulfonate content

发布日期：1989-07

标准范围

将试验部分溶解在乙醇中，并将溶液酸化。烷烃单磺酸通过轻质石油萃取从烷烃二磺酸盐和硫酸根离子中分离出来。轻石油相蒸发，残渣溶解在乙醇中。微量碱通过阳离子交换柱去除。用无碳酸盐氢氧化钠溶液中和洗脱液。干燥并称重由此形成的烷烃单磺酸钠。计算了烷烃单磺酸盐的平均相对分子质量和烷烃单磺酸盐含量。

A test portion is dissolved in ethanol and the solution is acidified. The alkane monosulfonic acids are separated from the alkane disulfonates and sulfate ions by extraction with light petroleum. The light petroleum phase is evaporated and the residue is solved in ethanol. Traces of alkali are removed by means of a cation-exchange column. The eluate is neutralized with carbonate-free sodium hydroxide solution. The sodium alkane monosulfonates so formed are dried and weighed. The mean relative molecular mass of the alkanemonosulfonates and the alkanemonosulfonate content are calculated.

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