抗坏血酸
微分脉冲伏安法
化学
尿酸
检出限
电化学
电极
选择性
核化学
玻璃碳
循环伏安法
无机化学
色谱法
有机化学
生物化学
催化作用
物理化学
食品科学
作者
Ali A. Ensafi,M. Taei,Taghi Khayamian,Abbas Arabzadeh
标识
DOI:10.1016/j.snb.2010.02.048
摘要
A highly selective electrochemical method was developed for the simultaneous determination of ascorbic acid (AA), dopamine (DA), and uric acid (UA) using sulfonazo III film-modified on glassy carbon electrode. The modified electrode showed excellent electrocatalytic activity toward the oxidation of AA, DA, and UA. The calibration curves were obtained with 0.5–1300.0 μmol L−1 AA, 0.05–470.0 μmol L−1 DA, and 0.2–100.0 μmol L−1 UA. Detection limits of 0.17 μmol L−1 AA, 0.03 μmol L−1 DA, and 0.11 μmol L−1 UA were obtained. The influence of various substances on the selectivity of the sensor was studied. The results confirm the high selectivity, good sensitivity, and stability of the modified electrode. Satisfactory results were achieved for the determination of DA, AA, and UA with dopamine injection solution, vitamin C tablets, and human urine samples.
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