Abstract
The silver doped poly(L-arginine)-modified glassy carbon electrode was prepared by electropolymerization. Cyclic voltammetry and electrochemical impedance spectroscopy were used to study the electrochemical properties of the modified electrode. The modified electrode exhibits good electrocatalytic activity for the oxidation of vitamin B2 (VB 2), vitamin C (VC) and vitamin B6 (VB 6). Under optimal conditions, VB2, VC and VB6 are oxidized at–0.298, 0.317 and 1.058 V, respectively, at the modified electrode using linear sweep voltammetry method. The linear ranges for VB2, VC and VB6 are 1.0 × 10–7–2.3 × 10–5, 5.0 × 10–6–4.0 × 10–3 and 1.0 × 10–5–3.0 × 10–3 M, respectively, and the detection limits are 8 × 10–8, 3 × 10–6 and 5 × 10–6 M. The modified electrode has been successfully applied to simultaneous determination VB2, VC and VB6 in multivitamin tablets with satisfactory results.
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Liu, G., Wang, Y.M. & Sun, D.M. Simultaneous determination of vitamins B2, B6 and C using silver-doped poly(L-arginine)-modified glassy carbon electrode. J Anal Chem 71, 102–109 (2016). https://doi.org/10.1134/S1061934815120114
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DOI: https://doi.org/10.1134/S1061934815120114