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Citation: LI Hong-Bo, LI Jing, JIN Gen-Di, DU Shi, REN Yan-Yan, HU Xiao-Ya. Electrocatalytical Oxidation and Determination of Luteolin at Ionic Liquid Modified Electrode[J]. Chinese Journal of Applied Chemistry, ;2010, 27(8): 978-982. doi: 10.3724/SP.J.1095.2010.90635 shu

Electrocatalytical Oxidation and Determination of Luteolin at Ionic Liquid Modified Electrode

LI Hong-Bo ^a,b, ,
LI Jing ^a ,
JIN Gen-Di ^b ,
DU Shi ^b ,
REN Yan-Yan ^b ,
HU Xiao-Ya ^b

a. Chemistry and Biology Engineering School, Yancheng Institute of Technology, Yancheng 224051;
b. College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002

Received Date: 25 September 2009
Revised Date: 18 December 2009

A glassy carbon electrode modified with hydrophobicity 1-n-butyl-3-methylimidazolium hexafluoro-phosphate([BMIM]PF₆/GCE) was fabricated. In a 0.2 mol/L phosphate buffer solution(pH 4.0~8.0), cyclic voltammetry and differential pulse stripping voltammetry were used to investigate the electrochemical behavior of luteolin at the modified electrode and a new method for detection of luteolin was established. As a result,an improved response of luteolin at the modified electrode was observed with peak potential shift negatively and increase of peak current. An electrocatalytic quasi-reversible redox process of controlled by absorption was obtained for luteolin on the surface of the modified electrode in a potential range of-0.2~0.7 V at pH=7.0. The charge transfer coefficient(α) and adsorbed amount(Γ) were calculated to be 0.5 and 4.6 × 10^-10mol/cm²,respectively. The anodic current increased linearly with luteolin concentration in a range of 1.0 × 10^-10~1.6 × 10^-8 mol/L with a detection limit of 3.2 × 10^-11 mol/L,and the recovery is between 98.7% and 102.0%. The method is simple,quick,accurate and reliable. It may provide a novel way for flavonoid determination in wild chrysanthemum flower.
- luteolin,
- ion liquid,
- modified electrode,
- flavonoid,
- electrochemistry
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