Abstract
The potential application of ordered mesoporous carbon (OMC)-modified glassy carbon electrode (OMC/GCE) in electrochemistry as a novel electrode material was investigated. X-ray diffraction, transmission electron micrographs, and cyclic voltammetry were used to characterize the structure and electrochemical behaviors of this material. Compared to GC electrode, the peak currents of potassium ferricyanide (K3[Fe(CN)6]) increase and the peak potential separation (ΔE p) decreases at the OMC/GC electrode. These phenomena suggest that OMC-modified GC electrode possesses larger electrode area and faster electron transfer rate, as compared with bare GC electrode. Furthermore, riboflavin was detected using OMC/GC electrode in aqueous solutions. The results showed that, under an optimum condition (pH 7.0), the OMC/GC electrode exhibited excellent response performance to riboflavin in the concentration range of 4.0 × 10−7 to 1.0 × 10−6 M with a high sensitivity of 769 µA mM−1. The detection limit was down to around 2 × 10−8 M. With good stability and reproducibility, the present OMC/GC electrode was applied in the determination of vitamin B2 content in vitamin tablets, and satisfactory results were obtained.
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The authors gratefully acknowledge the financial support by the National Natural Science Foundation of China (No. 20875012).
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Bai, J., Ndamanisha, J.C., Liu, L. et al. Voltammetric detection of riboflavin based on ordered mesoporous carbon modified electrode. J Solid State Electrochem 14, 2251–2256 (2010). https://doi.org/10.1007/s10008-010-1065-1
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DOI: https://doi.org/10.1007/s10008-010-1065-1