AUTOMATED HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHIC METHOD FOR THE DETERMINATION OF ORGANOPHOSPHORUS PESTICIDES IN WATERS WITH DUAL ELECTROCHEMICAL (REDUCTIVE OXIDATIVE) DETECTION

被引：23

作者：

MARTINEZ, RC

GONZALO, ER

GARCIA, FG

MENDEZ, JH

机构：

[1] Departamento de Química Analítica, Nutrición y Bromatología, Universidad de Salamanca

来源：

JOURNAL OF CHROMATOGRAPHY | 1993年 / 644卷 / 01期

关键词：

D O I：

10.1016/0021-9673(93)80119-S

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A highly sensitive method for multi-residue analysis of organophosphorus pesticides by HPLC with dual electrochemical detection has been developed. It involves the detection of reduction products from the upstream electrode in an oxidative mode at the downstream electrode. This reductive-oxidative detection mode allows detection limits below 4 mug/l. When a preconcentration device was coupled on-line with the HPLC system, detection limits as low as 0.03 mug/l were achieved for only 100 ml of sample. The relative standard deviations were in an acceptable range for trace analysis. The overall analysis time for the five pesticides investigated (paraoxon, guthion, methyl-parathion, ethyl-parathion and fenitrothion) was 25 min.

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页码：49 / 58

页数：10

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