在线萃取流动注射法快速测定水体中阴离子表面活性剂  

Rapid Determination of Anionic Surfactant in Water Samples by On-line Extraction Flow Injection Analysis

作　　者：王丽平[1,2] 田芹[2] 江林[2] 张卓勇[1] 

机构地区：[1]首都师范大学化学系,北京100048 [2]国家地质实验测试中心,北京100037

出　　处：《岩矿测试》2009年第6期553-556,共4页Rock and Mineral Analysis

基　　金：国家地质实验测试中心基本科研业务费项目资助(200607CSJ17)

摘　　要：采用在线萃取预处理功能模块,配合流动注射分析法对水体中阴离子表面活性剂进行了快速测定。通过对萃取模块结构的优化,解决了测试过程中峰形拖尾、接口处氯仿渗出以及萃取膜频繁更换的问题。方法检出限为10.2μg/L;阴离子表面活性剂的浓度在50.0~1 000.0μg/L有良好的线性（相关系数0.999 3）;精密度（100μg/L,n=7）为2.5%;实际水样的加标回收率为97.8%~112.6%;检测频率为18个样/h。方法操作简便,与传统的亚甲基蓝分光光度法比较,样品测试速度快,分析效率高,可以满足现场水质快速批量检测的要求。Anionic surfactant （AS） in water sample was determined rapidly by flow injection analysis with an on-line extraction functional module. Some problems in the determination, such as peak tailing, chloroform exudation at the outlet of extraction module and replacing extraction membrane frequently were solved by optimizing structure of the extraction functional module. The detection limit was 10.2 μg/L with the linear range of 50.0 - 1 000.0 μg/L（r = 0. 999 3）. The precision （ 100 μg/L, n = 7） and recovery were 2.5% RSD and 97.8%- 112. 6% respectively. The detection frequency was 18 sarnples/h. Compared with traditional methylene blue spectrophotometry, the method provides the features of simple operation, high-efficiency and therefore can meet the requirements of the on-site batch water sample analysis.

关 键 词：流动注射分析 阴离子表面活性剂 在线萃取 功能模块 

分 类 号：TQ423.11[化学工程] P641[天文地球—地质矿产勘探]