Electrochemical determination of tannic acid at glassy carbon electrode modified by antimony film

Abstract

In this study the electrochemical determination of tannic acid (TA) was performed using a glassy carbon electrode (GCE) modified with antimony film. The influences of deposition time, deposition potential, bath concentration and pH on the reduction current enhancement of TA were optimized, and electrochemical method for the determination of TA was reported. Linear sweep voltammetry (LSV) was used for electro-determination of TA. Using antimony film modified glassy carbon electrode (Sb-GCE), the reduction of TA was observed at the potential of −0.8 V vs. Ag/AgCl. Under optimum conditions, the result revealed two linear range regions between 0.5 μM to 2 μM and 5 μM to 40 µM of concentration. The limit of detection (LOD) was found to be 0.2 μΜ and 3.9 μM. The developed method was used for electroanalysis of TA in tea samples.