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探讨了氨水介质中痕量铜(Ⅱ)催化过氧化氢氧化邻苯二酚紫的褪色反应及其动力学条件,建立了测定乙醇和氯仿中痕量铜(Ⅱ)的新方法,测定范围为0—40ngCu~(2+)/25ml,方法灵敏度为1.0×10~(12)gCu~(2+)/ml,回收率97%—99%,测定结果稳定.
The fading reaction and kinetic conditions for the oxidation of catechol violet catalyzed by trace copper (Ⅱ) in aqueous ammonia were investigated. A new method for the determination of trace copper (Ⅱ) in ethanol and chloroform was established. The determination range was The sensitivity of the method was 1.0 × 10 ~ (12) gCu ~ (2 +) / ml, the recoveries were 97% -99%. The results were stable.