Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (2): 225-231.DOI: 10.11944/j.issn.1000-0518.2015.02.140139

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

HE Fengyun*, PAN Zhaorui, ZHOU Hong, LIU Huan, YU Jing, GU Xiaoyan, TANG Pengpeng   

  1. School of Biochemical and Environmental Engineering,Nanjing Xiaozhuang University,Nanjing 211171,China
  • Received:2014-04-21 Revised:2014-07-22 Published:2015-02-10 Online:2015-02-10
  • Contact: HE Fengyun, associate professor; Tel/Fax:025-86178274; E-mail:hefengyun1976@163.com; Research interests:electroanalysis
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.21171097, No.21301094), Open Lab Project of Nanjing University Key Lab of Analytical Chemistry for Life Science of Ministry of Education(No.KLACLS08001), Nanjing Xiaozhuang University Science Research Project(No.2010KYYB19), Nanjing Xiaozhuang University Chemistry Key Discipline Project and Jiangsu Province Undergraduate Innovation Training Project(No.2013053)

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 3.06.5 acetate buffer. Under optimized conditions, DPV was utilized for the measurement of VB6. The linear range for the quantitative determination of VB6 is 0.04100 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%.

Key words: poly p-aminobenzene sulfonic acid, pyridoxine hydrochloride, modified electrode, differential pulse voltammetry

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