盐酸吡哆辛在聚溴甲酚绿修饰电极的电化学特性

• 作 者: 姚军 李将渊 罗洋
• 机 构: 西华师范大学化学化工学院应用化学与污染技术四川省重点实验室,
• 出 处: 电化学
• 发表日期: 2009年02期
• 关键词: 盐酸吡哆辛 溴甲酚绿 修饰电极 电化学 动力学 氧化峰电流 循环伏安法 氧化峰 电极 电化学特性

应用循环伏安法、线性电位扫描法研究盐酸吡哆辛(VB6)在聚溴甲酚绿修饰电极上的电化学特性.在pH=4 HAc-NaAc缓冲溶液,0.7~1.2 V电位区间,盐酸吡哆辛在聚溴甲酚绿电极有一不可逆氧化峰(0.978 V),转移电子数n为1,质子数m为1,传递系数α为0.37.VB6氧化峰电流与其浓度1×10-3~2×10-5mol/L范围内呈线性关系,相关系数0.9967,样品加标平均回收率为100.06%,检出下限为2×10-6mol/L.

Cyclic voltammetry and linear potentiometric scanning were used to study the electrochemical characteristics of pyridoxine hydrochloride (VB6) on poly (bromocresol green) modified electrode.Under the condition of pH = 4 HAc-NaAc buffer solution and 0.7-1.2 V potential, hydrochloric acid Pyridoxine has an irreversible oxidation peak (0.978 V) at bromocresol green electrode, the number of electron transfer n is 1, the number of proton m is 1 and the transfer coefficient α is 0.37. The oxidation peak current of VB6 is similar to that of 1 × 10-3 ~ 2 × 10-5mol / L, with a correlation coefficient of 0.9967. The average recovery rate of spiked samples was 100.06%, and the detection limit was 2 × 10-6mol / L.