阻抑褪色光度法测定水中阴离子表面活性剂  

Analysis of Anionic Surfactant in Water Using Inhibition Discoloring Spectrophotometry

作　　者：金晓英[1] 余立斌[1] 陆李春[1] 

机构地区：[1]福建师范大学化学与材料学院,福州市350007

出　　处：《光谱实验室》2006年第6期1225-1229,共5页Chinese Journal of Spectroscopy Laboratory

摘　　要：研究了甲基橙(M O)、氯化十六烷基吡啶(CPC)以及阴离子表面活性剂之间的反应,结果发现CPC与M O形成缔合物,可使M O发生褪色反应,而阴离子表面活性剂则对该反应有阻抑作用。基于以上反应机理,建立了阻抑褪色光度法测定水体中阴离子表面活性剂的方法。实验表明,反应体系适合的pH为5.59,测定最大吸收波长为465nm,在体积为10mL的溶液中,12.5μg/mL M O和15.0μg/mL CPC存在条件下,十二烷基苯磺酸钠(SDBS)在0—15.0μg/mL符合比耳定律,该方法的相对标准偏差小于1.5%,方法的检出限为0.707m g/L,试样加标回收率为99.38%—102.0%。该法可用于生活污水或洗涤工业生产等阴离子表面活性剂含量较高的水体的测定。The reactions within methyl orange （MO）, cetylpyridinium chloride （CPC） and the anionic surfactant were studied. It was found that MO and CPC could be associated and discoloring the solution, while if the anionic surfactant was added, discoloring could be inhibited. Basing on this mechanism a spectrophotometric method was developed for the determination of anionic surfactants in water. Dodecyl benzene sulfonic acid sodium salt （SDBS） was determined at 465nm and pH5.59. Beer＇s law is obeyed in concentration range of 0-15.0μg/mL with 12. 5μg/mL Mo and 15.0μg/mL CPC. The relative standard deviation is lower than 1.5% and recovery is in the range of 99.38%-102. 0% after adding standard solution into samples. The determination limit of the method was 0. 707mg/L. This method can be used in the determination of anion surfactant in wastcwater.

关 键 词：阴离子表面话性剂 阻抑褪色光度法 甲基橙 氯化十六烷基吡啶 

分 类 号：O657.32[理学—分析化学]