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在 Na2 HPO4介质中 ,研究了 Fe( )催化 H2 O2 氧化甲基百里酚蓝褪色指示反应及其动力学条件 ,建立了测定痕量铁的新方法。方法的线性范围为 0 .0 2～ 0 .2 5μg/2 5m L,检出限为 0 .0 1 2 μg/2 5m L。用以测定过氧化碳酸钠 ( 2 Na2 CO3· 3H2 O2 )中的铁 ,结果令人满意。
In Na2 HPO4 medium, the reaction of fading of methyl thymol blue catalyzed by Fe () and its kinetic conditions was studied, and a new method for the determination of trace iron was developed. The linear range of the method was 0.2-2.5 μg / 2 5m L with a detection limit of 0.012 μg / 25m L. For the determination of iron in sodium peroxodisulfate (2 Na2 CO3 · 3H2 O2), the results were satisfactory.