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首页> 外文期刊>Electroanalysis >Voltammetric Determination of Phenoxybenzyl-Type Insecticides at Chemically Modified Conducting Polymer-Carbon Nanotubes Coated Electrodes
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Voltammetric Determination of Phenoxybenzyl-Type Insecticides at Chemically Modified Conducting Polymer-Carbon Nanotubes Coated Electrodes

机译：在化学修饰的导电聚合物-碳纳米管涂层电极上伏安法测定苯氧苄基型杀虫剂

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摘要

fenvalerate (FEN) was investigated at glassy carbon electrode (GCE), multiwalled carbon nanotubes modified GCE (MWCNT-GCE), polyaniline (herein called as modifier M-1) and polypyrrole (herein called as modifier M-2) deposited MWCNT/GCE using cyclic voltammetry. Influences of pH, scan rate, and concentration were studied. The surface morphology of the modified film was characterized by scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD). A systematic study of the experimental parameters that affect differential pulse stripping voltarnmetry (DPSV) was carried out and the optimized experimental conditions were arrived at. The calibration plots were linear over the insecticide's concentration range 0.1-100 mgL(-1) and 0.05-100 mg L-1 for all the three insecticides at MWCNT-GCE and MWCNT(M-1)-GCE respectively. The MWCNT(M-2)-GCE performed well among the three electrode systems and the determination range obtained was 0.01 -100 mg L-1 for CYP, DEL and FEN. The limit of detection (LOD) was 0.35 mu g L-1, 0.9 mu g L-1 and 0.1 mu g L-1 for CYR DEL and FEN respectively on MWCNT(M-2)-GCE modified system. Suitability of this method for the trace determination of insecticide in spiked soil sample was also determined.
机译：在玻碳电极（GCE），修饰的多壁碳纳米管修饰的GCE（MWCNT-GCE），聚苯胺（以下称为改性剂M-1）和聚吡咯（以下称为改性剂M-2）沉积的MWCNT / GCE上研究了氰戊菊酯（FEN）使用循环伏安法。研究了pH，扫描速率和浓度的影响。通过扫描电子显微镜（SEM）和X射线衍射分析（XRD）表征改性膜的表面形态。对影响差分脉冲剥离伏安法（DPSV）的实验参数进行了系统研究，并确定了最佳实验条件。在MWCNT-GCE和MWCNT（M-1）-GCE上，所有三种杀虫剂的浓度在0.1-100 mgL（-1）和0.05-100 mg L-1的浓度范围内均呈线性关系。在三个电极系统中，MWCNT（M-2）-GCE表现良好，对于CYP，DEL和FEN的测定范围为0.01 -100 mg L-1。 MWCNT（M-2）-GCE修饰系统的CYR DEL和FEN的检出限（LOD）分别为0.35μg L-1、0.9μgL-1和0.1μgL-1。还确定了该方法对加标土壤样品中痕量杀虫剂的适用性。

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