中文摘要：       本文研究了多方波伏安法在开发一种利用定制金微电极且简单、灵敏、快速、低成本测定不同样本中敌百虫除草剂含量的电分析方法中的应用。对实验和伏安参数进行优化并在每个步骤叠加八个脉冲后，利用多方波伏安法获得的检测限比方波伏安法或先前公布的色谱程序所获得的检测限高两个数量级。此外，本研究采用多方波伏安法与定制金微电极联用测定甜菜根、洋葱、桃子、环境水和河流沉积物中敌百虫除草剂含量，获得了令人满意的加标样本回收率。因此，定制金微电极与多方波伏安法在复杂样品检测敌百虫残留方面具有一定的适用性。
外文摘要：This paper reports the use of multiple square wave voltammetry (MSWV) in the development of a simple, sensitive, fast and low-cost electroanalytical procedure for the diquat herbicide detection in
different samples employing a custom-made gold microelectrode (Au-ME). The experimental and voltammetric parameters were optimized, and the use of eight pulses superimposed in each step in the MSWV yielded the detection limits two orders of magnitude greater than those obtained by SWV or previously published chromatographic procedures. Also, the Au-ME allied to MSWV was used to determine diquat in beetroot, onion, peach, environmental water and river sediments. All samples were spiked, and the obtained recovery percentage values were satisfactory for the analytical procedure, showing that Au-ME and MSWV is a suitable tool for diquat residues detection in complex samples.
外文关键词：direct analysis, diquat, gold microelectrode, multiple square wave voltammetry, sensitivity, square wave voltammetry
作者：De Souza, Djenaine; Machado, Sergio A. S.
作者单位：Univ Fed Uberlandia, Lab Eletroanalit Aplicada Biotecnol & Engn Alimen, Campus Patos Minas, BR-38700126 Patos De Minas, MG, Brazil.
期刊名称：JOURNAL OF ANALYTICAL CHEMISTRY
期刊影响因子：0.971
出版年份：2018
出版刊次：6
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