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首页> 外文期刊>Journal of environmental science and health >Ultrasensitive determination of carbendazim in water and orange juice using a carbon paste electrode
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Ultrasensitive determination of carbendazim in water and orange juice using a carbon paste electrode

机译：碳糊电极超灵敏测定水和橙汁中的多菌灵

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摘要

A carbon paste electrode was used for the electrochemical quantification of carbendazim in water and orange juice samples. Carbendazim oxidation on the electrode surface was found to be controlled by adsorption. The novel electrochemical procedure for carbendazim quantification employed differential pulse voltammetry using a carbon paste electrode under optimal conditions. Carbendazim oxidation currents were linear at concentrations of 2.84 to 45.44 μg L~(-1) with a limit of detection of 0.96 μg L~(-1) The proposed method was applied to carbendazim quantification in ultrapurified water, river water, and orange juice. Recovery rates in water and orange juice samples were in the 97%-101% range, indicating that the method can be employed to determine carbendazim in these matrices, with advantages including shorter analysis time and lower cost than routine methods such as chromatography or spectroscopy. The electrode showed good reproducibility, remarkable stability, and especially good surface renewability by simple mechanical polishing. The recovery rates observed were highly concordant with those obtained for high-performance liquid chromatography, having a relative standard deviation of less than 1.3%.
机译：碳糊电极用于水和橙汁样品中多菌灵的电化学定量。发现电极表面上的多菌灵氧化受吸附控制。用于多菌灵定量的新的电化学程序采用差动脉冲伏安法，在最佳条件下使用碳糊电极。多菌灵的氧化电流在2.84至45.44μgL〜（-1）范围内呈线性，检出限为0.96μgL〜（-1）。该方法用于超纯水，河水和橙汁中的多菌灵定量分析。水和橙汁样品中的回收率在97％-101％范围内，表明该方法可用于测定这些基质中的多菌灵，与常规方法（如色谱法或光谱法）相比，其优点是分析时间短且成本较低。通过简单的机械抛光，该电极显示出良好的可重复性，显着的稳定性，尤其是良好的表面可更新性。观察到的回收率与高效液相色谱法获得的回收率高度一致，相对标准偏差小于1.3％。

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