论文部分内容阅读
以联苯三唑醇为模板分子,通过电聚合邻苯二胺,在玻碳电极表面制备了对模板分子具有特异识别的分子印迹电化学传感器。实验选用铁氰化钾(K3[Fe(CN)6])作为电活性探针,采用循环伏安法(CV)和差分脉冲伏安法(DPV)研究了该传感器的电化学特性,并且优化了制备条件,研究了印迹传感器对模板分子及其结构类似物的选择性响应。结果表明:在最佳聚合条件下,p H=7.2,模板分子:功能单体=1:4(c/c),聚合圈数15圈,洗脱时间为13 min,洗脱剂:0.5 mol/L硫酸:乙腈=1:9(V/V),连续洗脱10次之后,相对标准偏差为5.2%,且传感器性能无衰减现象。该分子印迹电化学传感器灵敏度高,抗干扰能力强,对联苯三唑醇及其结构类似物具有良好的选择性响应,可以对结构类似物分别进行测定,为快速检测食品中联苯三唑醇奠定了基础。
Biphenyltriazol was used as a template molecule to fabricate a molecularly imprinted electrochemical sensor with specific recognition on the surface of glassy carbon electrode by electropolymerization of o-phenylenediamine. The electrochemical properties of this sensor were investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) using potassium ferricyanide (K3 [Fe (CN) 6] The preparation conditions were studied, and the selective response of the imprinted sensor to the template molecule and its structural analogues was studied. The results showed that p H = 7.2 under the optimal polymerization conditions, the molecular weight of the template was 1: 4 (c / c), the number of polymerization cycles was 15, the elution time was 13 min and the eluent was 0.5 mol / L sulfuric acid: acetonitrile = 1: 9 (V / V), the relative standard deviation of 5.2% after 10 consecutive elution, and the sensor performance without attenuation phenomenon. The molecularly imprinted electrochemical sensor has high sensitivity and strong anti-interference ability, and has good selective response to the biltrizole alcohol and its structural analogues. The molecular imprinted electrochemical sensors can be respectively used for the determination of the biltrizole alcohol Foundation.