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首页> 外文期刊>Analytical Sciences >Enhanced Electrochemiluminescence Employed for the Selective Detection of Methyl Parathion Based on a Zirconia Nanoparticle Film Modified Electrode
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Enhanced Electrochemiluminescence Employed for the Selective Detection of Methyl Parathion Based on a Zirconia Nanoparticle Film Modified Electrode

机译：基于氧化锆纳米粒子膜修饰电极的甲基对硫磷的选择性检测的增强电化学发光

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摘要

A simple, rapid and sensitive electrochemiluminescence (ECL) sensor was proposed for direct measurements of methyl parathion (MP) based on the strong affinity of a nano zirconia particles (ZrO_(2) NPs) modified film on the electrode to the phosphoric group. ZrO_(2) NPs, which could provide a larger absorption area to immobilize organophosphorus, was firstly modified on the glassy carbon electrode surface to prepare the proposed ECL sensor (ZrO_(2)/GC). Subsequently, the ZrO_(2)/GC electrode was scanned from –0.8 to +0.6 V to obtain the background signal at 0.44 V in a luminol/KCl solution. Then, a certain concentration of MP was added to an aqueous solution for 240 s, which was absorbed onto the ZrO_(2)/GC electrode surface. Moreover, the MP absorbed on the surface of the ZrO_(2)/GC electrode enhanced the ECL signal of luminol in the luminol/KCl solution, which increased with the concentration of MP. As a result, a novel ECL sensor was obtained in a luminol/KCl solution. The MP was determined in the range of from 3.8 × 10~(?11) to 3.8 × 10~(?6) mol L~(?1), with a low detection limit of 1.27 × 10~(?11) mol L~(?1) (S/N = 3). The proposed ECL sensor performance for MP detection will open a new field in the application of rapid and screen detection of ultra-trace amounts of organ phosphorus pesticides (OPs) of vegetables used in farm markets.
机译：基于电极上的纳米氧化锆颗粒（ZrO_（2）NPs）修饰膜对磷酸基团的强亲和力，提出了一种简单，快速，灵敏的电化学发光（ECL）传感器，用于直接测量甲基对硫磷（MP）。 ZrO_（2）NPs可以提供更大的吸收面积来固定有机磷，首先在玻璃碳电极表面进行修饰，以制备所提出的ECL传感器（ZrO_（2）/ GC）。随后，将ZrO_（2）/ GC电极从–0.8扫描到+0.6 V，以获得在luminol / KCl溶液中0.44 V的背景信号。然后，将一定浓度的MP添加到水溶液中240秒钟，然后将其吸收到ZrO_（2）/ GC电极表面上。此外，ZrO_（2）/ GC电极表面吸收的MP增强了Luminol / KCl溶液中Luminol的ECL信号，该信号随MP浓度的增加而增加。结果，在鲁米诺/ KCl溶液中获得了新型的ECL传感器。 MP的测定范围为3.8×10〜（？11）mol L〜（？1）mol L〜（？1），检测下限为1.27×10〜（？11）mol L 〜（Δ1）（S / N ＝ 3）。拟议的用于MP检测的ECL传感器性能将为快速和筛选检测农产品市场中使用的蔬菜中痕量有机磷农药（OP）的应用开辟一个新领域。

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