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研究了纳米CoO化学修饰电极对NO-2的测定。实验结果表明,在0.15 mol/L HAc-NaAc(pH 4.0)溶液中,该修饰电极对NO-2具有明显的催化和增敏作用。峰电流与NO-2浓度在8.0×10-7～6.0×10-3mol/L范围内呈良好的线性关系,检测限为1.0×10-7mol/L。研究了NO-2在该修饰电极上的电化学机理,并将该法用于右江水中NO-2的测定。
The nano-CoO chemically modified electrode for the determination of NO-2 was studied. The experimental results show that the modified electrode has obvious catalytic and sensitizing effects on NO-2 in 0.15 mol / L HAc-NaAc (pH 4.0) solution. The peak current and NO-2 concentration in the range of 8.0 × 10-7 ~ 6.0 × 10-3mol / L showed a good linear relationship with a detection limit of 1.0 × 10-7mol / L. The electrochemical mechanism of NO-2 on the modified electrode was studied and the method was applied to the determination of NO-2 in Youjiang River.