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１引言 在碱性介质中，痕量Ｃｏ（Ⅱ）见对Ｈ２Ｑ２氧化邻联甲苯胺（ｏ－Ｔｏｌｉｄｉｎｅ）的显色反应具有强烈的催化作用，探讨了利用该反应进行痕量Ｃｏ（Ⅱ）测定的影响因素，建立了测定痕量Ｃｏ（Ⅱ）的催化动力学光度法，该方法的灵敏度为１．７８ × １０－６ｇ／Ｌ，测
1 Introduction In alkaline media, traces of Co (Ⅱ) see the H2O2 oxidation o-Tolidine (o-Tolidine) color reaction has a strong catalytic effect of the use of the reaction trace Co (Ⅱ) determination , The kinetic spectrophotometry was established for the determination of trace Co (Ⅱ). The sensitivity of this method was 1.78 × 10-6g / L,