【摘要】 建立溴甲酚绿（ＢＣＧ）－溴化十六烷基吡啶（ＣＰＢ）光度法测定水中阴离子表面活性剂的方法。实验表明，最适合的ｐＨ范围为５．５－９．０，λｍａｘ＝６１４ｎｍ，在８６μｇＣＰＢ存在下，十二烷基苯磺酸钠（ＳＤＢＳ）和十二烷基硫酸钠（ＳＤＳ）分别在０－８０μｇ／１０ｍｌ和０－７５μｇ／１０ｍｌ范围内符合比耳定律，其表观摩尔吸光系数分别为２．９×１０４和３．１×１０４Ｌ·ｍｏｌ－１·ｃｍ－１。用此法测定了河水和生活废水中的阴离子表面活性剂，相对标准偏差＜３．０％，样品加标平均回收率为９９．３％。更多还原

【Abstract】 In this paper a spectrophotometric method has been developed for the determination of anionic surfactants in water with bromocresol green(BCG) and cetylpyridinium bromide(CPB).Sodium dodecylbenzenesulfonate(SDBS) and sodium dodecylsulfate(SDS) were determined at 614 nm and pH range of 5.5-9.0.In the concentration range of 0-80 μg/10 ml for SDBS and 0-75μg/10 ml for SDS,both of them obey Beer’s law in the presence of 86 μg CPB.The apparent molar absorptivities are 2.9 ×104 L.mol-1.cm -1 for SDBS and 3.1×104 L.mol-1.cm-1 for SDS.The proposed method has been applied to the determination of anionic surfactants in river water and wastewater.The average recovery of environmental water samples was 99.3% and the relative standard deviation was less than 3.0%.更多还原