Detection of pesticides in ground water has become a very important and crucial research area due to the rapid expansion of agriculture and stringent environmental protection acts. In this paper, the as-prepared CuO-TiO₂ hybrid nanocomposites were decorated on the glass carbon electrode as the nonenzymatic electrochemical nanosensor for the sensitive and selective detection of methyl parathion. The electrochemical behavior of the modified electrode was investigated by cyclic voltammetry, showing that the modified electrode can be used for methyl parathion detection. Differential pulse voltammetry was applied to evaluate methyl parathion detection ability under optimized experimental conditions, and found the modified electrode can detect methyl parathion sensitively in a wide dynamic detection range from 0 ppb to 2000 ppb with a lower limit of detection (LOD) of 1.21 ppb. In addition, other interfering materials have no any influences on the detection of methyl parathion. Furthermore, the modified electrode has also been used for methyl parathion detection in the actual ground water samples, and showed efficient sensing ability. The electrochemical sensor developed would have great potentiality for methyl parathion sensing and provide new insights into the detection of other organophosphorous pesticides in the ground water.

由于农业的迅速发展和严格的环境保护措施，地下水中农药的检测已成为一个非常重要和至关重要的研究领域。本文制备的CuO-TiO ₂杂化纳米复合材料被装饰在玻璃碳电极上，作为非酶电化学纳米传感器，用于灵敏和选择性地检测甲基对硫磷。通过循环伏安法研究了修饰电极的电化学行为，表明该修饰电极可用于甲基对硫磷的检测。在优化的实验条件下，采用差分脉冲伏安法评估甲基对硫磷的检测能力，发现改进的电极可以在0 ppb至2000 ppb的宽动态检测范围内灵敏地检测甲基对硫磷，最低检测限（LOD）为1.21 ppb 。另外，其他干扰物质对甲基对硫磷的检测没有任何影响。此外，修饰的电极也已用于实际地下水样品中的甲基对硫磷检测，并显示出有效的感应能力。开发的电化学传感器将具有巨大的潜力用于甲基对硫磷传感，并为检测地下水中其他有机磷农药提供新的见解。