Disposable clay-coated screen-printed electrode for amitrole analysis

被引：20

作者：

Zen, JM ^{[1
]}

Chen, HP ^{[1
]}

Kumar, AS ^{[1
]}

机构：

[1] Natl Chung Hsing Univ, Dept Chem, Taichung 402, Taiwan

来源：

ANALYTICA CHIMICA ACTA | 2001年 / 449卷 / 1-2期

关键词：

amitrole; screen-printed electrode; clay; nontronite; flow injection analysis;

D O I：

10.1016/S0003-2670(01)01338-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A preanodized nontronite-coated screen-printed electrode (NSPE*) was developed for the sensitive detection of the pesticide amitrole by square-wave voltammetry (SWV) and flow injection analysis (FIA). The preanodization process was essential to improve the sensitivity because of the existence of higher iron oxidation state in the interlayer of nontronite clay. Factors influencing the SWV and FIA responses were evaluated in this study. Under optimized conditions, the calibration curve showed a linear range up to 300 and 500 muM for SWV and FIA, respectively, in pH 4.5 PBS. The detection limit (S/N = 3) was 0.33 muM in SWV and 0.07 ng in a 20 mul sample loop by FIA. The high precision and sensitivity of the method offers an easy route for direct determination of amitrole. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：95 / 102

页数：8

共 28 条

[1] Amitrole effects on chloroplasts of barley plants grown at different temperatures [J].