Chemiluminescence of dithiocarbarnate fungicides based on the luminol reaction

被引:33
作者
Kubo, H
Tsuda, Y
Yoshimura, Y
Homma, H
Nakazawa, H
机构
[1] Kitasato Univ, Minato Ku, Tokyo 1088641, Japan
[2] Hoshi Univ, Fac Pharmaceut Sci, Shinagawa Ku, Tokyo 1428501, Japan
关键词
chemiluminescence; dithiocarbamate fungicides; electron spin resonance; flow injection analysis; luminol;
D O I
10.1016/S0003-2670(03)00894-8
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The chemiluminescence of luminol with dithiocarbamate fungicides (ziram, mancozeb and propineb) was examined by flow injection analysis (FIA). It was found that chemiluminescence was directly produced by the reaction of dithiocarbamate fungicides with luminol in the presence of a catalyst in an alkaline solution. Hexacyanoferrate(III) as catalyst/cooxidant and hexacyanoferrate(II) as depressor were used for the reaction. To explain the mechanism of the chemiluminescence of luminol with dithiocarbamate fungicides, electron spin resonance (ESR) measurements were performed. ESR showed that hydroxyl radicals were generated from dithiocarbamate fungicides in the alkaline solution by using 5,5'-dimethyl-1-pyrroline N-oxide as a spin trap agent. Detection limits (S/N = 3) of ziram, mancozeb and propineb were 2.0, 0.1 and 0.5 ppb (milliard 1,000,000,000), respectively. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:49 / 53
页数:5
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