2013 Volume 81 Issue 11 Pages 900-905
In the present study, mechanism of the chitosan modified screen-printed electrode catalytic reaction was described and experimental conditions were defined for the determination of peroxide value in vegetable oil using differential pulse anodic stripping voltammetry. Due to the fact that protonated chitosan can absorb only iodide ion, chitosan modified electrode was applied to determine the oxidation process of iodide. Results showed that the peak current value decreased with increasing peroxide value in the vegetable oil and reveled a good correlation (R = 0.9914) with the peroxide in the concentration range of 0.01–3.2 µg/mL. Moreover, the peroxide value measured in the vegetable oil using chitosan modified electrode was in agreement with the results obtained using standard iodometric method.
