Selective determination of vitamin B₂ at electrochemically activated glassy carbon electrode

Electrochemically activated glassy carbon electrodes were applied to the preconcentration and electroanalysis of Vitamin B₂ (VB₂) in multivitamin preparation. Voltammetric peak currents resulting from VB₂ species adsorbed on activated electrodes showed linear response for VB₂ concentrations in the range between 0.1 and 3.0 μM with a large slope of 12.2 AM^-1 and a correlation coefficient of 0.996. The reproducibility of the voltammetric measurements was usually less than 7% RSD for five replicate measurements. Common vitamin and metal species did not interfere in the determination.