Electrochemical Behavior and Determination of Rutin at Inlaid Multi-wall Carbon Nanotubes Modified Graphite Electrode and Reline Ionic Liquids

摘要

Inlaid multi-wall carbon nanotubes modified graphite electrode (MWCNTs-GE) was fabricated, combined with Reline Ionic Liquids which possess high conductivity and wide electrochemical window, the electrochemical behavior and determination of Rutin was investigated by cyclic voltammetry and differential pulse stripping voltammetry. The result shows that the oxidation peak current of rutin increased obviously at the inlaid multi-wall carbon nanotubes modified graphite electrode and in the Reline Ionic Liquids compared to that at the bare graphite electrode (GE). In phosphate buffer solution (pH=6.3), one pair of redox peak of rutin was obtained by cyclic voltammetry with 0.32 V of E_(pa) and 0.24 V of E_(pc). The oxidation peak current value was linearly related to the concentration of rutin in the range of 2><10~(-6)~3xl0~(-5)moI?L~(-1) and the detection limit was 9.4x10~(-7) mol-L~(-1) . The average RSD of rutin was 4.0%. The average recovery was 100.2%. The inlaid multi-wall carbon nanotubes modified graphite electrode and the Reline Ionic Liquids had the function of electrocatalysis to oxidation of rutin obviously. This method is reliable, fast and convenient, sensitive and can be used for the determination of the content of rutin.