Rapid voltammetric detection of kojic acid at a multi-walled carbon nanotubes screen-printed electrode

- The voltammetric behavior of kojic acid at a disposable MWCNTs screen-printed electrode was studied.
- A simple and sensitive voltammetric method for kojic acid determination was developed.
- The obtained detection limit for kojic acid was 0.016 mM by using DPV.
- The developed voltammetric method was compared with chromatographic and spectrometric method.
- The method is a cheap tool for rapid kojic acid content analysis of vinegar samples.

A differential pulse voltammetric method for the determination of kojic acid (KA) was developed. The electrochemical behavior of KA at a multi-walled carbon nanotubes modified screen-printed electrode (MWCNTs-SPCE) was explored. A single irreversible oxidation peak was observed at a potential of 0.791 V and 0.989 V on the MWCNTs-SPCE and screen-printed carbon electrode (SPCE), respectively. Under the optimized conditions, the anodic peak current of KA recorded by differential pulse voltammetry varies linearly with KA concentration in the range 0.02-5 mM with a detection limit of 0.016 mM. The MWCNTs-SPCE was used for quantitative analysis of KA in food samples and the results indicate the feasibility of the amperometric method for KA analysis in routine detection.

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