Using ordered mesoporous carbon (OMC) as the sensing material, an amperometric biosensor for ascorbic acid (AA) determination was successfully built on a glassy carbon electrode (GCE). Using a micro-electrochemistry system (MECS), the detection capability of the sensor was evaluated. Compared with the results obtained for a bare GCE, the AA oxidation overpotential of the OMC detector decreased by approximately 800 mV. The electro-catalytic oxidation peak currents had a linear relationship with

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... he AA concentration over the range of 3.5 × 10 − 7 -7 × 10 − 5 mol/L and a detection limit of 1.5 × 10 − 7 mol/L (S/N = 3). Additionally, the sensor was shown to be interference free and exhibited good stability and reproducibility.