Laboratorio di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche e Ambientali, Università del Salento, via Monteroni, 73100 Lecce, Italy.
Anal Bioanal Chem. 2013 Apr;405(11):3587-92. doi: 10.1007/s00216-013-6723-6. Epub 2013 Jan 25.
The electrochemical behavior of bisphenol A (BPA) was studied on poly(3,4-ethylenedioxythiophene) (PEDOT)-modified glassy carbon electrodes by cyclic voltammetry. It was observed that BPA oxidation on PEDOT film produced a BPA polymer (pBPA) showing excellent redox activity with anodic and cathodic peaks at 0.15 and 0.01 V, respectively; the former being evaluated for BPA electrochemical sensing. The amount of deposited pBPA has been estimated by electrochemical and spectroscopic analysis by X-ray photoelectron spectroscopy. The effect of scan rate and pH on the oxidation of pBPA film has been studied. The oxidation current was found to vary linearly with BPA concentration in the range 90-410 μM, and a detection limit of 55 μM was evaluated. Results of BPA amperometric detection have also been collected by using a repetitive potential step program to give a linear response to BPA in the concentration range 40-410 μM with a detection limit of 22 μM and a sensitivity of 1.57 μAμM(-1) cm(-2). The developed sensor showed satisfactory reproducibility and anti-interference properties and was successfully applied to BPA determination in mineral water samples.
通过循环伏安法研究了双酚 A（BPA）在聚（3,4-亚乙基二氧噻吩）（PEDOT）修饰的玻碳电极上的电化学行为。结果表明，BPA 在 PEDOT 膜上的氧化产生了一种具有良好氧化还原活性的 BPA 聚合物（pBPA），其阳极和阴极峰分别在 0.15 和 0.01 V 处；前者被评估用于 BPA 的电化学传感。通过电化学和 X 射线光电子能谱的光谱分析估计了沉积的 pBPA 的量。研究了扫描速率和 pH 值对 pBPA 膜氧化的影响。发现氧化电流随 BPA 浓度在 90-410 μM 范围内呈线性变化，检测限为 55 μM。还通过使用重复电位阶跃程序收集了 BPA 的安培检测结果，给出了 40-410 μM 范围内对 BPA 的线性响应，检测限为 22 μM，灵敏度为 1.57 μAμM（-1）cm（-2）。所开发的传感器表现出令人满意的重现性和抗干扰性能，并成功应用于矿泉水样品中 BPA 的测定。
