Voltammetric determination of kojic acid in cosmetic bleaching products using a disposable screen-printed carbon electrode

A preanodized screen-printed carbon electrode is used for the determination of kojic acid in cosmetic bleaching products by square-wave voltammetry. T he preanodization process leads to a marked enhancement of the current resp onse of kojic acid at the screen-printed carbon electrode. The linear range is up to 260 mu M in pH 10 Britton-Robinson buffer with a detection limit (S/N=3) of 0.17 mu M. The electrode has the advantages of low cost, of bein g easy to handle, and it can be either disposable or reused since the renew al gives a reproducible surface. Quantitative analysis for the kojic acid c ontent in cosmetic products was performed by the standard addition method.