分子印迹电化学发光传感器检测毒死蜱

石墨相氮化碳纳米薄片（g-C₃N₄NSs）具有优良的电化学发光（ECL）性能和良好的成膜特性.以g-C₃N₄NSs作为ECL材料，利用其良好的成膜性能将其固定在玻碳电极（GCE）上，再以毒死蜱（CPF）作模板分子，甲基丙烯酸（MAA）作功能单体，通过分子自组装制备分子印迹聚合物（MIP）.将该聚合物引入g-C₃N₄NSs修饰电极，构建了一个MIP-ECL传感器.除去模板分子的传感器能够选择性识别CPF，利用CPF对g-C₃N₄NSs ECL信号的淬灭作用实现了CPF的高灵敏、高选择性检测.传感器对CPF的线性响应范围是1.0×10^-8~1.0×10^-4mol·L^-1，检出限（LOD）是5.0 nmol·L^-1，用于蔬菜中CPF残留量检测，结果令人满意.

Molecularly imprinted polymer electrochemiluminescence sensor for sensitive and selective detection of chlorpyrifos

Graphite carbon nitride nanosheets (g-C₃N₄NSs) exhibite excellent electrochemiluminescence (ECL) performance and good film-forming properties. In this paper, g-C₃N₄NSs were used as an ECL material to be fixed on a glassy carbon electrode(GCE). A molecularly imprinted polymer (MIP) was prepared by molecular self-assembly with chlorpyrifos (CPF) as template molecule and methacrylic acid (MAA) as functional monomer. The polymer was then introduced into g-C₃N₄NSs modified electrode to construct a MIP-ECL sensor. After removing the template molecule, the sensor can specifically recognize CPF. Based on the specific recognition and quenching effect of CPF on the ECL signal of g-C₃N₄NSs, the high sensitive and selective detection of CPF was achieved. The sensor shows a linear response to CPF in range of 1.0×10^-8-1.0×10^-4 mol·L^-1 and limit of detection (LOD) of 5.0 nmol·L^-1. It was used to detect CPF residues in vegetables and the results were satisfactory.