A Mesoporous Carbon-Based Amperometric Sensor for Ascorbic Acid Determination

Haiyang Zhang
2019 International Journal of Electrochemical Science  
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
more » ... 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.
doi:10.20964/2019.06.65 fatcat:nz2zjmgrwnhu3cb7owua4cvw4u