PVP-CdS修饰玻碳电极电化学氧化法测定微量盐酸黄连素  

Determination of trace berberine hydrochloride by electrochemical oxidation method using polyvinylpyrrolidone-cadmium sulfide modified glassy carbon electrodes

作　　者：高艺玮 王国胜 GAO Yiwei;WANG Guosheng(College of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学化学工程学院,辽宁沈阳110142

出　　处：《化工环保》2020年第4期449-454,共6页Environmental Protection of Chemical Industry

摘　　要：使用不同分散剂制备了聚乙烯吡咯烷酮-硫化镉(PVP-CdS)催化剂,研究了盐酸黄连素在PVP-CdS修饰玻碳电极上的电化学行为。实验结果表明:与裸电极相比,PVP-CdS修饰玻碳电极提高了盐酸黄连素的氧化电流;当外加电压为0.5~1.4 V、电位增量为0.018 V、缓冲溶液pH为6时,盐酸黄连素质量浓度在1~200 mg/L的范围内与氧化峰电流呈良好的线性关系,检出限为0.15 mg/L。通过盐酸黄连素氧化前后的红外谱图分析,推断出了氧化机理。Polyvinylpyrrolidone-cadmium sulfide(PVP-CdS)catalyst was prepared with different dispersants.The electrochemical behaviors of berberine hydrochloride on the PVP-CdS modified glassy carbon electrodes(PVP-CdS/GCE)were investigated.The experimental results show that:Compared with the bare electrode,the PVP-CdS/GCE enhanced oxidation current of berberine hydrochloride;When the applied voltage is 0.5-1.4 V,the potential increment is 0.018 V and the buffer solution pH is 6,the mass concentration of berberine hydrochloride,in the range of 1-200 mg/L,has a good linear relationship with the oxidation peak current with a detection limit of 0.15 mg/L.The oxidation mechanism of berberine hydrochloride is deduced by analyzing the infrared spectra of berberine hydrochloride before and after oxidation.

关 键 词：聚乙烯吡咯烷酮 硫化镉 玻碳电极 盐酸黄连素 循环伏安法 差分脉冲伏安法 

分 类 号：X83[环境科学与工程—环境工程]