水中直链烷基苯磺酸盐同系物的高速液相色谱法测定
DETERMINATION OF LINEAR ALKYLBENZENE-SULFONATES HOMOLOGOUS SERIES IN WATER BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY
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摘要: 用高效液相色谱法分析了环境标准品和湖水中LAS的烷基同系物的组成,并比较了几种商品级LAS中同系物的比例。用YWG-CH作为固定相和含高氯酸钠的甲醇水溶液为流动相达到LAS同系物较好地分离。成功地用732阳离子交换树脂吸附除去萃取液中的亚甲基蓝。方法的回收率为95.01%,标准差±2.97,最低检出量10ng。还用此法检测了武昌东湖湖水中LAS的含量。Abstract: The compositions of linear alkylbenzenesulfonate (LAS) homologous series in water were separated and ditermined by high performance liquid chromatographic method using YWG-CH as a stationary phase and aqueous methanol solution contaning sodium perchlorate as a mobile phase.The me-thylene blue in the extract was removed by passing through a column of 732 cation exchange resin before injecting into HPLC. LAS recovery of the method was 95.01%.The relative standard deviation and the lowest detectable amount of LAS were�2.97 and 10 ng, respectively. Homologous series composition of various commercial products of LAS were compared. LAS in water of the Dong lake, Wuhan, was determined by this proposed method.
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