制备了乙酰胆碱酯酶/Nafion/普鲁士蓝修饰的玻碳电极,测试了该修饰电极检测有机农药西维因(carbaryl)和敌百虫(trichlorfon)的性能指标.利用原子力显微镜和电化学技术研究了电极的构造及其对于有机农药检测性能指标的影响.结果表明,乙酰胆碱酯酶均匀地分散到Nafion/普鲁士蓝修饰的玻碳电极上.在最优的实验条件下,构筑的修饰电极检测西维因和敌百虫的线性范围分别为0.01 ～0.5 μmol/L及2.0～10.0 μmoL/L和0.02～ 1.0 μmol/L及2.0～8.0 μmol/L,检出限分别为5.0和10.0 nmol/L.并对模拟的实际样品进行了检测,发现该方法有较高的检测灵敏度、较好的重复性和抗干扰性.
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