Facile construction of CeO2-ZnO nanospheres modified carbon paste electrochemical sensor for the determination of gallic acid as a crucial antioxidant

Key Points

• Detection of gallic acid using a novel electrochemical sensor shows high sensitivity and specificity.
• The sensor exhibited a linear range of 0.1 to 20 µM with a limit of detection at 0.02 µM.
• Facile construction of CeO2-ZnO nanospheres modified carbon paste enabled effective gallic acid measurement.
• This method may enhance antioxidant monitoring in various food applications, indicating broader usage.