POLAROGRAPHIC-DETERMINATION OF TOTAL PYRETHROID RESIDUES IN STORED CEREALS

被引：19

作者：

CORBINI, G

BIONDI, C

PROIETTI, D

DREASSI, E

CORTI, P

机构：

来源：

ANALYST | 1993年 / 118卷 / 02期

关键词：

PYRETHROID; DIFFERENTIAL-PULSE POLAROGRAPHY; CEREAL; 3-PHENOXYBENZALDEHYDE; SOLID-PHASE EXTRACTION;

D O I：

10.1039/an9931800183

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new method for determination of the total cyanopyrethroid residue concentration in stored cereals by differential-pulse polarography is proposed. Cyanopyrethroids were previously extracted with a non-polar solvent and purified by solid-phase extraction. The total pyrethroid residue concentrations are determined by differential-pulse polarography of 3-phenoxybenzaldehyde formed quantitatively by rapid and reproducible alkaline alcoholysis of the sample. The method is linear, quantitative and reproducible for maize and wheat analysis in the range 0.1-3.0 mg kg-1. A thin-layer chromatographic method for identification of six widely used cyanopyrethroids in the sample is described. The electrodic reduction process of 3-phenoxybenzaldehyde is examined and the reduction products isolated and identified.

引用

页码：183 / 187

页数：5

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