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使用基于三氯乙基磷酸的碳糊电极测定除草剂利谷隆。

Voltammetric determination of the herbicide Linuron using a tricresyl phosphate-based carbon paste electrode.

机构信息

Laboratory of Physics, Vinča Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia.

出版信息

Sensors (Basel). 2012;12(1):148-61. doi: 10.3390/s120100148. Epub 2011 Dec 22.

DOI:10.3390/s120100148
PMID:22368461
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3279205/
Abstract

This paper summarises the results of voltammetric studies on the herbicide 3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea (Linuron), using a carbon paste electrode containing tricresyl phosphate (TCP-CPE) as liquid binder. The principal experimental conditions, such as the pH effect, investigated in Britton-Robinson buffer solutions (pH 2.0-7.0), the peak characteristics for the analyte of interest, or instrumental parameters for the differential pulse voltammetric mode were optimized for the method. As found out, the best electroanalytical performance of the TCP-CPE was achieved at pH 2.0, whereby the oxidation peak of Linuron appeared at ca. +1.3 V vs. SCE. The analytical procedure developed offers good linearity in the concentration range of 1.25-44.20 μg mL(-1) (1.77 × 10(-4)-5.05 × 10(-6) mol L(-1)), showing-for the first time-the applicability of the TCP-CPE for anodic oxidations in direct voltammetry (without accumulation). The method was then verified by determining Linuron in a spiked river water sample and a commercial formulation and the results obtained agreed well with those obtained by the reference HPLC/UV determination.

摘要

本文总结了使用含磷酸三苯酯（TCP-CPE）作为液体粘合剂的碳糊电极对除草剂 3-（3,4-二氯苯基）-1-甲氧基-1-甲基脲（利谷隆）进行伏安法研究的结果。在 Britton-Robinson 缓冲溶液（pH 2.0-7.0）中研究了主要实验条件，例如 pH 效应、感兴趣分析物的峰特征或差分脉冲伏安法模式的仪器参数，对该方法进行了优化。结果发现，TCP-CPE 的最佳电分析性能在 pH 2.0 时达到，利谷隆的氧化峰出现在约 +1.3 V vs. SCE。所开发的分析程序在 1.25-44.20 μg mL(-1)（1.77 × 10(-4)-5.05 × 10(-6) mol L(-1)）的浓度范围内呈现良好的线性关系，首次展示了 TCP-CPE 在直接伏安法（无需积累）中用于阳极氧化的适用性。然后通过在加标河水样品和商业制剂中测定利谷隆来验证该方法，所得结果与参考 HPLC/UV 测定结果吻合良好。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/05467545a914/sensors-12-00148f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/11337e5af8b7/sensors-12-00148f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/db4be02c0f61/sensors-12-00148f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/7551bdc5c5c5/sensors-12-00148f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/8bd9459ff793/sensors-12-00148f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/b7e8c6bef384/sensors-12-00148f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/ef71f0028fe7/sensors-12-00148f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/05467545a914/sensors-12-00148f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/11337e5af8b7/sensors-12-00148f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/db4be02c0f61/sensors-12-00148f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/7551bdc5c5c5/sensors-12-00148f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/8bd9459ff793/sensors-12-00148f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/b7e8c6bef384/sensors-12-00148f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/ef71f0028fe7/sensors-12-00148f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/84e4/3279205/05467545a914/sensors-12-00148f7.jpg

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Determination of pesticides in surface and ground waters by liquid chromatography-electrospray-tandem mass spectrometry.
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