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合成洗涤剂的种类繁多,最常用的是十二烷基苯磺酸钠(以AB8表示).这是一种阴离子型表面活性剂.它在水体中浓度达到一定时,不仅产生泡沫,影响感官性状,同时由于较难降解,故更引起人们的关注.对ABS的分析惯用方法是LM法(Longwell-Maniece法).该法根据ABS和亚甲基兰生成兰色络合物被氯仿萃取,用分光光度法进行测定.该法已被列入标准分析方法,虽被很多国家采用,但存在某些缺点.(1)氯仿是毒害品,对操作者健康和环境都有一定危害;(2)操作繁锁费时;(3)干扰大,特别对河口水或海水由于氯度高,使测定值偏高;(4)灵敏度不高.长期来,国外有些学者在研究新的分
A wide range of synthetic detergents, the most commonly used sodium dodecyl benzene sulfonate (AB8 said). This is an anionic surfactant concentration in the water at a certain time, not only produce foam, affecting the senses Traits, but also due to more difficult to degrade, so more people’s attention.Analysis of ABS is the usual method using the LM method (Longwell-Maniece method) .According to ABS and methylene blue blue complex generated by chloroform extraction, Spectrophotometric determination of this method has been included in the standard analytical methods, although adopted by many countries, but there are some shortcomings. (1) chloroform is a toxic product, to the operator’s health and the environment are some hazards; (2 ) Cumbersome and time-consuming operation; (3) interference is large, especially on the estuary water or sea water due to the high chloride, the measured value is high; (4) the sensitivity is not high.For a long time, some foreign scholars in the study of new points