Study of the electrochemical behavior of isorhamnetin on a glassy carbon electrode and its application.
The electrochemical behavior of isorhamnetin (ISO) at a glassy carbon electrode was studied in a phosphate buffer solution (PBS) of pH 4.0 by cyclic voltammetry (CV) and differential pulse voltammetric method (DPV). A well-defined redox wave of ISO involving one electrons and one proton appeared. The electrode reaction is a reactant weak adsorption-controlled process with a charge transfer coefficient (alpha) of 0.586. Based on the understanding of the electrochemical process of ISO at the glassy carbon electrode, analysis of ISO can be realized. Under optimal conditions, the oxidation peak current showed linear dependence on the concentration of ISO in the range of 1.0x10(-8) to 4.0x10(-7)M and 1.0x10(-6) to 1.0x10(-5)M. The detection limit is 5.0x10(-9)M. This method has been successfully applied to the detection of ISO in tablets.
Liu
Ai-Lin
AL
Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou 350004, PR China.
Zhang
Shao-Bo
SB
Chen
Wei
W
Huang
Li-Ying
LY
Lin
Xin-Hua
XH
Xia
Xing-Hua
XH
D002244:Carbon / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D044948:Flavonols / Q000032:analysis* / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D015394:Molecular Structure; D011794:Quercetin / Q000031:analogs & derivatives; D015203:Reproducibility of Results; D012996:Solutions
D044948:Flavonols; D012996:Solutions; C047368:3-methylquercetin; D002244:Carbon; D011794:Quercetin