引用本文:
何凤云, 潘兆瑞, 周宏, 刘欢, 俞静, 顾小燕, 唐鹏鹏. 盐酸吡哆辛在聚对氨基苯磺酸修饰电极上的电化学行为与测定[J]. 应用化学,
2015, 32(2): 225-231.
doi:
10.11944/j.issn.1000-0518.2015.02.140139
Citation: HE Fengyun, PAN Zhaorui, ZHOU Hong, LIU Huan, YU Jing, GU Xiaoyan, TANG Pengpeng. Electrochemical Behavior and Determination of Pyridoxine Hydrochloride at Poly p-Aminobenzene Sulfonic Acid Modified Electrode[J]. Chinese Journal of Applied Chemistry, 2015, 32(2): 225-231. doi: 10.11944/j.issn.1000-0518.2015.02.140139
Citation: HE Fengyun, PAN Zhaorui, ZHOU Hong, LIU Huan, YU Jing, GU Xiaoyan, TANG Pengpeng. Electrochemical Behavior and Determination of Pyridoxine Hydrochloride at Poly p-Aminobenzene Sulfonic Acid Modified Electrode[J]. Chinese Journal of Applied Chemistry, 2015, 32(2): 225-231. doi: 10.11944/j.issn.1000-0518.2015.02.140139
盐酸吡哆辛在聚对氨基苯磺酸修饰电极上的电化学行为与测定
摘要:
通过电聚合法制备了聚对氨基苯磺酸(PABSA)修饰玻碳电极(GCE),采用循环伏安法(CV)和差分脉冲伏安法(DPV)研究了盐酸吡哆辛(VB6)在该修饰电极上的电化学行为。结果表明,VB6在该修饰电极上的氧化电流显著增加,为裸电极上的7.5倍。在p H值3.0~6.5的醋酸缓冲溶液中,VB6在PABSA/GCE上的电极反应为吸附控制的一电子两质子的不可逆氧化反应。在优化条件下,使用DPV对VB6进行了定量检测,线性范围为0.04~100μmol/L,检出限为0.01μmol/L,是目前所报道的电化学方法测定VB6的最低检出限,相对平均偏差为3.1%(n=8)。采用本方法对维生素B6片中的VB6进行检测,回收率为106%~108%。
English
Electrochemical Behavior and Determination of Pyridoxine Hydrochloride at Poly p-Aminobenzene Sulfonic Acid Modified Electrode
Abstract:
A poly p-aminobenzene sulfonic acid (ABSA) modified glassy carbon electrode (GCE) was prepared by electroploymerization. The electrochemical behavior of pyridoxine hydrochloride (VB6) was studied by cyclic voltammetry(CV) and differential pulse voltammetry(DPV) on the modified electrode. The results show that the oxidation current of VB6 on the modified electrode increases remarkably 7.5 times as that on the bare GCE. The electrode reaction of VB6 on PABSA/GCE is an diffuse-limited irreversible oxidation process involving one electron and two protons in the pH 3.0~6.5 acetate buffer. Under optimized conditions,DPV was utilized for the measurement of VB6. The linear range for the quantitative determination of VB6 is 0.04~100 μmol/L and the limit of detection is 0.01 μmol/L. This is the lowest detection limit of the known reported electrochemical analytical methods for the determination of VB6. The proposed method was applied to the analysis of VB6 tablets rapidly with recoveries between 106% and 108%.
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