尿酸和肾上腺素在电化学活化玻碳电极上的电化学行为。
Electrochemical behavior of uric acid and epinephrine at an electrochemically activated glassy carbon electrode.
作者信息
Qiao Jian Xian, Luo Hong Qun, Li Nian Bing
机构信息
School of Chemistry and Chemical Engineering, Southwest University, Chongqing, PR China.
出版信息
Colloids Surf B Biointerfaces. 2008 Mar 15;62(1):31-5. doi: 10.1016/j.colsurfb.2007.09.012. Epub 2007 Sep 16.
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.
提出了一种通过电化学活化预处理的玻碳电极，用于通过差分脉冲伏安法同时研究和测定肾上腺素和尿酸。这种预处理的玻碳电极表现出强大且持久的电子介导行为，随后对肾上腺素和尿酸有分离良好的氧化峰，电位差为161 mV，该电位差足以单独和同时测定肾上腺素和尿酸。在最佳条件下，肾上腺素的检测限为8.9×10⁻⁸ mol L⁻¹，尿酸的检测限为1.6×10⁻⁷ mol L⁻¹。所提出的方法成功用于实际样品中肾上腺素和尿酸的测定，结果令人满意。
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