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过氧化氢能被一系列物质在电极上的还原产物所催化分解。我们发现锗(Ⅳ)与邻苯二酚或连苯三酚的络合物对过氧化氢也有催化分解作用。当溶液中有过氧化氢存在时,能使上述络合物的极谱波增高(图1),并在一定浓度范围内,随过氧化氢浓度的增大而线性地增高。可应用此催化波于测定样品中的锗、微量氧或过氧化氢。本文研究锗-连苯三酚-过氧化氢体系的催化极谱性质。在883型极谱仪上应用此催化波测定锗的灵敏度为0.2微克/毫升。
Hydrogen peroxide can be catalyzed and decomposed by a series of substances on the electrode. We have found that complexes of germanium (IV) with catechol or pyrogallol also catalyze the decomposition of hydrogen peroxide. When hydrogen peroxide is present in the solution, the polarographic wave of the complex is increased (Figure 1) and increases linearly with increasing hydrogen peroxide concentration over a range of concentrations. This catalytic wave can be applied to the germanium, trace oxygen or hydrogen peroxide in the test sample. In this paper, the catalytic polarographic properties of germanium-pyrogallol hydroperoxide system were studied. The application of this catalytic wave to the Model 883 Polarography instrument determined the sensitivity of germanium to 0.2 μg / ml.