流动注射化学发光法测定异丙威  

Determination of Isoprocarb by Flow Injection Combined with Chemiluminescence

作　　者：何树华[1] 何德勇[2] 章竹君[2] 

机构地区：[1]涪陵师范学院化学系,重庆408005 [2]西南大学分析科学研究所

出　　处：《应用化学》2006年第11期1298-1300,共3页Chinese Journal of Applied Chemistry

基　　金：重庆市教委科学研究项目(KJ051305);教育部春晖计划资助项目(Z2005-1-55006)

摘　　要：在酸性介质中,Ce（Ⅳ）氧化连二亚硫酸钠产生较弱的化学发光,异丙威可以明显增强此发光,增加的发光强度与异丙威的质量浓度在0.1-10 mg/L范围内呈良好的线性关系（r=0.999 7）,由此建立了一种测定异丙威的流动注射化学发光新方法,检出限为80μg/L（3σ）。对1.0 mg/L的异丙威连续平行测定11次,其相对标准偏差为3.3%。用于测定环境水样和大米中异丙威含量,回收率为96.1%-99.4%。A novel flow injection chemiluminescence （FI-CL） system for the determination of isoprocarb is presented. It was based on the chemiluminescence reaction of sodium hydrosulfite with Ce （ Ⅳ ） in a vitriol acid solution. The emission intensity can be obviously enhanced by isoprocarb. The proposed method is very sensitive, simple and quick. The enhanced value of chemiluminescence intensity was proportional to isoprocarb concentration in the range of 0. 1 - 10 mg/L（r = 0. 999 7）. The detection limit was 80μg/L and the relative standard deviation was 3.3% for 1.0 mg/L isoprocarb（ n = 11 ）. This method was successfully applied to the determination of isoprocarb in rice and water. The recovery was 96. 1% - 99. 4%.

关 键 词：化学发光 流动注射 连二亚硫酸钠 异丙威 

分 类 号：O657.3[理学—分析化学]