Electrochemical detection of rutin on nitrogen-doped graphene modified carbon ionic liquid electrode

Abstract

In this paper nitrogen-doped graphene (NG) was synthesized and applied to modify an ionic liquid 1-hexylpyridinium hexafluorophosphate based carbon ionic liquid electrode (CILE). The fabricated NG/CILE exhibited excellent electrochemical performances. Electrochemical behaviors of rutin on NG/CILE were carefully investigated with a pair of well-defined redox peaks appeared, which was attributed to the presence of NG with electrocatalytic activity. Electrochemical parameters of rutin on NG/CILE were calculated with the values of charge transfer coefficient (α), electron transfer number (n) and electrode reaction standard rate constant (ks) as 0.57, 1.76 and 1.24 s-1, respectively. Under the optimal conditions rutin could be detected in the concentration range from 7.0 × 10-10 to 1.0 × 10-5 mol/L with the detection limit as 0.23 nmol/L (3σ) by differential pulse voltammetry. The proposed method was further applied to the determination of rutin tablet samples with satisfactory results.

Department(s)

Physics, Astronomy, and Materials Science

Document Type

Article

DOI

https://doi.org/10.1016/j.snb.2014.03.080

Keywords

Carbon ionic liquid electrode, Electrochemistry, Nitrogen-doped graphene, Rutin

Publication Date

1-1-2014

Journal Title

Sensors and Actuators, B: Chemical

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