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通过自组装得方法制备了巯基乙酸修饰的金电极。在0.10 mol.L-1的磷酸盐缓冲溶液中(pH=7.0),用循环伏安法和示差脉冲伏安法研究了对苯二酚在修饰电极上的电化学行为,在相对低的电位条件下,对苯二酚显示一对氧化还原峰.在1.0×10-6mol.L-1到3.0×10-3mol.L-1浓度范围内,氧化峰电流与对苯二酚的浓度成线性关系,相关系数是0.998,检测限为4.0×10-7mol.L-1.该修饰电极在间苯二酚存在的条件下,能被用于选择性检测对苯二酚,得到了令人满意的结果.
The thioglycolic acid modified gold electrode was prepared by self-assembly method. The electrochemical behavior of hydroquinone on the modified electrode was investigated by cyclic voltammetry and differential pulse voltammetry in 0.10 mol·L-1 phosphate buffer solution (pH = 7.0). At relatively low potentials Under the conditions of hydroquinone showed a pair of redox peaks in the 1.0 × 10-6mol.L-1 to 3.0 × 10-3mol.L-1 concentration range, the oxidation peak current and the concentration of hydroquinone into a linear The correlation coefficient was 0.998 with a detection limit of 4.0 × 10-7mol·L-1. The modified electrode could be used to selectively detect hydroquinone in the presence of resorcinol, which was satisfactory the result of.