Determination of paraquat in waters by enzymatic inhibition using flow-injection analysis

被引：2

作者：

Lopez-Erroz, C ^{[1
]}

Viñas, P ^{[1
]}

Campillo, N ^{[1
]}

Hernandez-Cordoba, M ^{[1
]}

机构：

[1] Univ Murcia, Fac Chem, Dept Analyt Chem, E-30071 Murcia, Spain

来源：

INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY | 1998年 / 72卷 / 04期

关键词：

flow injection; paraquat; acetylthiocholine; acetylcholinesterase waters;

D O I：

10.1080/03067319808035898

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A flow injection method based on the inhibition of the hydrolysis of acetylthiocholine to thiocholine catalyzed by acetylcholinesterase is proposed for the determination of the herbicide paraquat. The liberated thiocholine is monitored spectrophotometrically using 5,5'-dithiobis(2-nitrobenzoic acid). The calibration graph based on peak area is linear in the range 0.2-1.5 mu g/ml with a relative standard deviation of +/-4.1 % The method is applied to the determination of paraquat in a commercial product and in several water samples.

引用

页码：267 / 274

页数：8

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