Electrochemical detection of rutin on Mg2Al-Cl layered double hydroxide modified carbon ionic liquid electrode

Abstract

In this paper a Mg2Al-Cl layered double hydroxide (Mg2Al-LDH) modified carbon ionic liquid electrode (CILE) was prepared and further used for the electrochemical detection of rutin. Cyclic voltammograms of rutin on Mg2Al-LDH/CILE were recorded with a pair of well-defined redox peaks appeared in pH 2.5 phosphate buffer solution, which was ascribed to the electrochemical reaction of rutin. Due to the presence of Mg2Al-LDH on the electrode surface, the redox peak currents increased greatly and the electrochemical parameters were calculated. Under the optimal conditions the oxidation peak current was proportional to rutin concentration in the range from 0.08 μmol L-1 to 800.0 μmol L-1 with the detection limit on 0.0255 μmol L-1 (3σ). The fabricated electrode showed good reproducibility and stability, which was successfully applied to rutin tablet samples determination.