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Electrochemical detection of ascorbic acid (vitamin C) using a glassy carbon electrode
Suw Young Ly1, Jung Ik Chae, Young Sam Jung
1Department of Fine Chemistry, School of Applied Chemical Engineering, Seoul National University of Technology, Seoul, South Korea. suwyoung@snut.ac.kr
Abstract:
A method for the detection of ascorbic acid (AA) was developed using square wave anodic stripping voltammetric (SWASV) analysis with a glassy carbon electrode (GCE). The results indicated a sensitive oxidation peak current of AA on the GCE. A linear curve was obtained within a concentration range of 1-130.0 microg/L with a preconcentration time of 270 s. The relative standard deviation of 30.0 microg/L observed was 0.1016% (n = 12) under optimum conditions. The low detection limit (S/N) was pegged at 0.30 microg/L. Results showed that the method developed can be used to assay biological and pharmaceutical samples, and food samples, as well as other materials requiring AA analyses.