Electrochemical behavior of uric acid and epinephrine at an electrochemically activated glassy carbon electrode.
A pretreated glassy carbon electrode by electrochemical activation has been proposed for simultaneous investigation and determination of epinephrine and uric acid by differential pulse voltammetry. This pretreated glassy carbon electrode exhibits a potent and persistent electron-mediating behavior followed by well-separated oxidation peaks towards epinephrine and uric acid with a potential difference of 161 mV, which is large enough to determine epinephrine and uric acid individually and simultaneously. Under the optimum condition, the detection limit of epinephrine is 8.9 x 10(-8)mol L(-1) and that of uric acid is 1.6 x 10(-7)mol L(-1). The proposed method was successfully used for the determination of epinephrine and uric acid in real samples with satisfactory results.
Qiao
Jian Xian
JX
School of Chemistry and Chemical Engineering, Southwest University, Chongqing, PR China.
Luo
Hong Qun
HQ
Li
Nian Bing
NB
D004563:Electrochemistry; D004566:Electrodes; D004837:Epinephrine / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D015203:Reproducibility of Results; D014527:Uric Acid / Q000737:chemistry*
D014527:Uric Acid; D004837:Epinephrine