Author/Authors :
Reddaiah، Kasetty نويسنده Electrochemical Research Laboratory, Department of Chemistry, S.V.U. College of Sciences, Sri Venkateswara University, Tirupati – 517 502, Andhra Pra , , Reddy، Tukiakula Madhusudana نويسنده Electrochemical Research Laboratory, Department of Chemistry, S.V.U. College of Sciences, Sri Venkateswara University, Tirupati – 517 502, Andhra Pra , , Raghu، Pamula نويسنده Electrochemical Research Laboratory, Department of Chemistry, S.V.U. College of Sciences, Sri Venkateswara University, Tirupati – 517 502, Andhra Pra , , Kumra Swamy، Bahaddurghatta E. نويسنده Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Shankaraghatta -577 451, Shimoga, Karnataka, India ,
Abstract :
The electrochemical behaviour of quercetin has been studied at carbon paste
electrode (CPE) and B-cyclodextrin modified carbon paste electrode (B-CDMCPE) by
employing cyclic voltammetry (CV) and Differential pulse voltammetry (DPV). The
B-CDMCPE showed a considerable electrocatalytic effect towards the oxidation peak of
quercetin, in Britton- Robinson (BR) buffer pH 2.5, (0.04 M) under, appropriate environment.
The anodic peak current is linear to quercetin concentration in the range of 6×10-6 M to
2×10-5 M with detection limited of 3×10-7 M and the limit of quantification of 1.2×10-6 M
respectively . The electro catalytic oxidation of quercetin at B-CDMCPE was compared with
CPE. The electrochemical process was reversible and adsorption controlled. The interfacial
electron transfer phenomenon of quercetin at the modified electrode was deliberated by using
electrochemical impedance spectroscopy (EIS), the studies showed that B-CDMCPE was well
eminent compared with bare CPE. The electrochemical sensor showed excellent sensitivity
towards the determination of quercetin.
