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中文摘要：
本文提出了以十六烷基三甲基溴化铵修饰碳糊电极（CTAB／CPE）直接测定尿酸（UA）的新方法，用线性扫描伏安法（LSV）研究尿酸的电化学行为。在0.1mol／L磷酸盐缓冲溶液（PBS，pH=7.4）中，尿酸在CTAB／CPE上于0.160V处产生一个灵敏的氧化峰，氧化峰电流Ip与尿酸浓度（CuA）在1.0×10^-5—1.0×10^-3mol／L范围内呈良好的线性关系，相关系数为0.9940，检出限为1.0×10^-6mol／L。该方法简单实用，可以直接用于人体尿液中尿酸的检测。
英文摘要：
In this work, a cetyltrimethylammonium bromide （CTAB） modified carbon paste electrode （CTAB/CPE） was developed on the basis of a surface modification method, which displayed an excellent electrochemical activity toward the oxidation of uric acid （UA）. The electrochemical behaviors of UA at CTAB/CPE were investigated by linear sweep voltammetry（LSV）. A sensitive oxidation peak of UA was observed at 0. 160 V for CTAB/CPE in 0.1 mol/L PBS （pH=7.4）. The oxidation peak current had a good linear relationship with the concentration of UA in the range of 1.0×10^-5-1.0×10^-3mol/L, with a low detection limit of 1.0×10^-6mol/L. This modified electrode was applied to the determination of UA in human urine samples and the result was satisfied.
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