An efficient electrochemical method was developed for sensitive detection of antioxidants.
Compared with chromatographic and spectroscopic techniques, the proposed method is convenient, rapid and low-cost.
Choline monolayer could provide a suitable local microenvironment for the assembly of graphene.
The graphene/choline film exhibited remarkable electrocatalytic activities toward the oxidation of antioxidants.
The present work implemented the analysis of antioxidants in real samples with satisfactory results.