基于铁氰化铈纳米膜的对苯二酚传感器

采用电聚合法制备了铁氰化铈纳米膜修饰玻碳电极,用扫描电镜(SEM)对修饰膜进行了表征。利用循环伏安(CV)法研究了对苯二酚(HQ)在该电极上的电化学行为。结果表明,与裸电极相比,HQ在铁氰化铈纳米膜修饰电极上的氧化峰峰电流有明显增高。用示差脉冲伏安(DPV)法在优化条件下检测出HQ在1.0×10-5~6.0×10-4mol/L浓度范围内与氧化峰电流有良好的线性关系,线性相关系数R=0.998。信噪比为3时,HQ的检出限为1.0×10-6mol/L。用该方法对环境水样中的HQ进行了分析,回收率为95.2%~104.8%。

The Hydroquinone Sensor Based on Cerium Hexacyanoferrate Nano-film

A glassy carbon electrode modified with cerium hexacynaoferrate nano-film prepared through electrochemical polymerization was characterized by scanning electron microscope （SEM）. Then the electrochemical behaviors of hydroquinone （HQ） on this eleetrode were investigated by cyclic voltammetry （CV）. The results indicated that the oxidation peak current of HQ on the electrode modified with cerium hexacynaoferrate nano-film had an obvious inerease compared with that of the bare glassy carbon electrode. When detected under the optimized conditions by differential pulse w,ltammetry （DPV）, there was a good linear relationship between the oxidation peak current and the HQ concentration in the range of 1.0×10^-5～6.0 ×10^-4 mol/L, with a correlation coefficient of 0.998. When the signal-to-noise ratio was 3, the detection limit of HQ was 1.0×10^-6 mol/L. Furthermore, the proposed method was applied to analyze the HQ in environmental water samples, and the HQ recoveries were in the range of 95.2%-104.8%.