应用恒电位沉积法制备了以壳聚糖为功能基体，啶虫脒为模板分子、戊二醛为交联剂的印迹膜电极，并构建印迹传感器。借助阳离子指示探针Ru(NH3)6Cl3，研究该印迹传感器的电化学响应特性及其对模板分子啶虫脒的分子识别性能。结果表明，印迹传感器具有良好的印迹效果，相较于结构类似物如吡虫啉等，对啶虫脒有较高的结合速率和特异性识别能力，且在啶虫脒浓度为1.0 × 10-7 ~ 2.0 × 10-5 mol/L范围内呈线性响应，为农药残留物中啶虫脒的选择性分析提供新的思路。
A novel molecularly imprinted membranes electrochemical sensor with good memory capacity to acetamiprid was developed. Based on electrodeposition technique, chitosan was deposited onto the surface of gold electrode as a functional polymer matrix along with aimed molecules acetamiprid and glutaraldehyde as a crosslinking agent. Cationic probe Ru(NH3)6Cl3 was employed to indirectly investigate the electrochemical characteristics as well as the imprinted effect of the sensors. The results showed that the sensors had a specific recognition to acetamiprid compared to the structural similarity midacloprid and other pesticide. There is more sensitive response to acetamiprid at imprinted sensors than that at nonprinted sensors with a good linearity over the concentration range of 1.0 × 10-7 ~ 2.0 × 10-5 mol/L. The prepared sensors can be exploited for the separation and analysis performing simultaneously to acetamiprid in the pesticide residue samples.
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