摘要
研究发现,在pH为2～3的范围内,Fe3+和过氧化氢反应产生的羟基自由基(·OH)可以氧化噻枯唑产生较弱的化学发光,罗丹明6G可以大大增强此发光,且增加的发光强度与噻枯唑的质量浓度在一定范围内呈良好的线性关系,由此建立了测定噻枯唑的流动注射化学发光新方法。该法的检出限为19μg/L(3σ),线性范围为0.03～5.0mg/L,对3.0mg/L的噻枯唑连续平行测定11次,其相对标准偏差(RSD)为3.1%。该法已成功测定了环境水样和大米中加入的噻枯唑含量,结果令人满意。
A novel chemiluminescence system for the determination of bismerthiazol is the first described in this paper. It is based on the chemiluminescence reaction of bismerthiazol and hydroxyl radical that was the product of the reaction of Fe^3＋ and H2O2. Rh6G can enhance the chemiluminescence intensity. The linear range is 0.03-5.0 mg/L with a detection limit of 19 μg/L（3σ）. The relative standard deviation is 3.1% for 3.0 mg/L of bismerthiazol （n=11）. The proposed method was successfully applied to the determination of bismerthiazol in water and in rice.
出处
《农药》
CAS
北大核心
2007年第3期182-184,共3页
Agrochemicals
基金
重庆市教委科学研究项目(KJ051305)
关键词
羟基自由基
罗丹明6G
流动注射
化学发光
噻枯唑
hydroxyl radical
rhodamine 6G
bismerthiazol
flow injection analysis
chemiluminesce
