采用反相高压液体色谱(HPLC)荧光法测定合成洗涤剂废水中的直链烷基苯磺酸钠(LAS),激发波长为232nm,发射波长为290nm。使用国产C_(18)色谱柱,甲醇/水体系作流动相,水样经微孔膜过滤后直接进入HPLC仪分析。当废水样中LAS浓度在17—24mg/l时,变异系数为0.8—2.4％;水样加标加收率为82±5％;最低检测浓度为0.016mg/l。 The linear sodium alkylbenzenesulfonate (LAS) in synthetic detergent wastewater was determined by reversed-phase high-pressure liquid chromatography (HPLC) with the excitation wavelength of 232 nm and the emission wavelength of 290 nm. Using domestic C_ (18) column and methanol / water system as mobile phase, the water sample was filtered through the microporous membrane and directly into HPLC analysis. When the concentration of LAS in wastewater was 17-24mg / l, the coefficient of variation was 0.8-2.4%; the spiked water yield was 82 ± 5%; the lowest detection concentration was 0.016mg / l.