本文研究了氨水介质中,痕量镍(Ⅱ)催化加速过氧化氢氧化邻苯二酚紫的褪色反应及其动力学条件。反应速率常数为2.217×10~(-3)/s,活化能为136.31kj/mol,半衰期为5.209min,建立了测定镍(Ⅱ)的新方法,灵敏度为1.29×10~(-10)g/mL,测定范围为0～5μg Ni~(2+)/25mL。 In this paper, the bleaching reaction and kinetic conditions of hydrogen peroxide catechol purple catalyzed by trace nickel (Ⅱ) catalyzed by ammonia in aqueous medium were studied. The reaction rate constant was 2.217 × 10 -3 / s, the activation energy was 136.31 kj / mol and the half-life was 5.209 min. A new method was developed for the determination of nickel (Ⅱ) with a sensitivity of 1.29 × 10 -10 g / mL, the measurement range is 0 ~ 5μg Ni ~ (2 +) / 25mL.