流动注射化学发光法测定水中的甲萘威  

Flow-Injection Chemiluminescence for Determination of Carbaryl in Water

作　　者：王举鹏[1] 李念兵[1] 罗红群[1] 

机构地区：[1]西南大学化学化工学院,重庆400715

出　　处：《西南大学学报（自然科学版）》2008年第7期66-69,共4页Journal of Southwest University(Natural Science Edition)

基　　金：重庆市自然科学基金资助项目(CSTC2006BB0342)

摘　　要：在酸性介质中硫酸铈与甲萘威作用，有微弱的发光现象，基于罗丹明B对该发光反应有明显的增敏效果，结合流动注射技术建立了一种测定甲萘威的简便快捷灵敏的方法。该方法的检出限为5．6×10^-9mol／L，线性范围是2．0×10^6～1．0×^10^-4～mol／L。对1．0×10^-5mol／L的甲萘威进行了11次连续平行测定，相对标准偏差为1.8％。对饮用水源中甲萘威的测定，回收率为95．4％～104．0％，其结果令人满意。A simple, sensitive and rapid flow-injection chemiluminescence analysis has been developed for the determination of carbaryl based on the chemiluminescence reaction of carbaryl with ceric sulfate in a sulphuric acid medium which could be augmented by Rhodamine B. A strong chemiluminescence signal was observed when carbaryl was injected into the acidic ceric sulfate solution in a flow-cell. The present method allowed the determination of carbaryl in a concentration range of 2.0×10^-6 to 1.0×10^-4 mol/L and the detection limit for carbaryl was 5.6×10^-9 mol/L. The relative standard deviation was 1.8 % for 11 replicate analyses of 1.0×10^-5 mol/L carbaryl. The proposed method was applied to the determination of carbaryl in water with satisfactory results.

关 键 词：硫酸铈 罗丹明B 化学发光 流动注射 

分 类 号：O657.3[理学—分析化学]