乙基紫-阴离子表面活性剂体系的共振瑞利散射光谱及其分析应用  

Resonance Rayleigh Scattering Spectra of Ethyl Violet-Anionic Surfactant Systems and Their Analytical Application

作　　者：陈飒[1] 刘绍璞[2] 罗红群[1] 

机构地区：[1]西南师范大学化学化工学院 [2]西南师范大学环境化学研究所,重庆400715

出　　处：《分析化学》2004年第1期19-24,共6页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金资助项目 (No .2 9875 0 19)

摘　　要：在弱酸性介质中 ,乙基紫 (EV)与阴离子表面活性剂 (ASF)反应形成离子缔合物 ,导致共振瑞利散射增强 ,并产生新的RRS光谱 ,最大RRS峰位于 330nm和 5 0 8nm。方法有很高的灵敏度 ,对于ASF的检出限分别为1.1μg/L十二烷基苯磺酸钠 (SDBS)、2 .5 μg/L十二烷基硫酸钠 (SDS)和 2 70mg/L十二烷基磺酸钠 (SLS) ,可用于痕量ASF的测定。研究了离子缔合反应的适宜条件 ,讨论了离子强度、有机溶剂、温度的影响 ,考察了方法的线性范围和选择性。方法用于合成水样和环境水样中阴离子表面活性剂的测定 。In weak acid media, the anionic surfactants (ASF) react with ethyl violet (EV) to form ion association complexes, which result in an increase of resonance Rayleigh scattering (RRS) and an appearance of a new RRS spectrum. The maximum RRS peaks are at 330 nm and 508 nm. This method has very high sensitivity, and the detection limit is 1.1 μg/L for SDBS, 2.5 μg/L for SDS and 270 μg/L for SLS. The suitable conditions of the ion-association reaction, the influencing factors such as ion strength, organic solvent and temperature, the linear range and the selectivity of the method have been investigated. The method was applied to the determination of trace amounts of anionic surfactants in synthesized water samples and environmental water samples with satisfactory results.

关 键 词：乙基紫 阴离子表面活性剂 共振瑞利散射 光谱分析 吸收光谱 

分 类 号：O657.3[理学—分析化学]