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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 shu

Electrochemical Behavior and Determination of Pyridoxine Hydrochloride at Poly p-Aminobenzene Sulfonic Acid Modified Electrode

1.
School of Biochemical and Environmental Engineering, Nanjing Xiaozhuang University, Nanjing 211171, China

Corresponding author: HE Fengyun,
Received Date: 21 April 2014
Available Online: 22 July 2014
Fund Project: 国家自然科学基金(21171097,21301094) (21171097,21301094)南京大学生命分析化学教育部重点实验室开放研究基金(KLACLS08001) (KLACLS08001)南京晓庄学院科研项目(2010KYYB19) (2010KYYB19)江苏省大学生创新训练项目(2013053)资助 (2013053)

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%.
- poly p-aminobenzene sulfonic acid,
- pyridoxine hydrochloride,
- modified electrode,
- differential pulse voltammetry
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