智能型流动注射-流通式电极法测定水体中阴离子表面活性剂  

Determination of Anionic Surfactant by Intelligent Flow Injection and Ion Selective Electrode Analysis

作　　者：魏福祥[1] 王蕊[1] 王浩然[1] 王占辉[1] 

机构地区：[1]河北科技大学环境科学与工程学院,河北石家庄050018

出　　处：《化学世界》2010年第8期466-469,472,共5页Chemical World

摘　　要：基于虚拟仪器技术,建立了测定水体中阴离子表面活性剂的流动注射分析系统。结果表明,以二次蒸馏水作为载液,注入载液的蠕动泵泵速为30r/min,进样体积260μL,管路长度为20cm的条件下,获得的电位信号稳定。电极在1×10-6～1×10-3mol/L的范围内对阴离子表面活性剂具有良好的能斯特响应,检测下限为4×10-7mol/L,经信号放大5倍后的电极响应斜率为0.2806V/dec,且电极具有良好的稳定性和抗干扰性。样品的加标回收率为96.8%。Based on virtual instrument technology,the flow injection analysis system used for determination of anionic surfactant in water was established.The results show that when double distilled water is used as carrier stream,the pump speed was 30 r/min the sampling volume was 260 μL and the length of disperse coil was 20 cm,the potential signal is stable.The linear range for the electrode is 1×10^-6 ～1×10^-3 mol/L,in which the electrode has a good Nernst response,and the detection limit is 4×10^-7 mol/L.After amplification of the potential signal for 5 times,the response slope is 0.2806 V/dec,and the electrode has good stability and interference immunity.The spiked average recovery is 96.8%.

关 键 词：虚拟仪器 数据采集 流动注射 阴离子表面活性剂 

分 类 号：O657.1[理学—分析化学]