The copper and poly para aminobenzoic acid compoud modified electrode was prepared by the cy⁃clic voltammetry. And the electrochemical behavior of hydroquinone on the modified electrode was studied. In pH3.5 phosphate buffer solution,with the scanning rate of 240 mV/s,hydroquinone produced a clear pair of redox peaks,and the peak potential were Epa= 0.376 V and Epc = 0.293 V,respectively. Hydroquinone oxi⁃dation peak current and concentration in the range of 3.0 × 10-6~1.0 × 10-3 mol/L had a good linear relation⁃ship,and the detection limit was 8.0×10-7 mol/L. Based on the study,a new method was established for de⁃termination of hydroquinone.And the method was used for the determination of hydroquinone samples with satisfactory results.%用循环伏安法制备铜/聚对氨基苯甲酸复合修饰电极，并研究对苯二酚在该修饰电极上的电化学行为.在pH3.5磷酸盐缓冲溶液中，扫描速率为240 mV/s时，对苯二酚会在铜掺杂修饰电极上产生一对清晰的氧化还原峰，峰电位分别为Epa=0.376 V，Epa=0.293 V.对苯二酚氧化峰电流与其浓度在3.0×10-6～1.0×10-3 mol/L范围内呈良好的线性关系，检出限为8.0×10-7 mol/L.基于对苯二酚在修饰电极上的电化学特性，为我们建立一种新的测定方法.对对苯二酚样品的测定分析，结果满意.
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