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本文研究了钯(Ⅰ)与l,10-邻菲啰啉和邻羧基苯基重氮氨基偶氮笨的分析特性。试验结果发现:在非离子表面活性剂Tween 80存在下,pH10.0的Na_2B_4O_7-NaOH介质中,显色反应的灵敏度高,络合物的最大吸收波长在520nm处,表观摩尔吸光系数为1.0×10~5L·mol~(-1)·cm~-1,Pd(Ⅰ)浓度在0~12μg/25ml之间符合比尔定律。以EDTA和酒石酸钾钠掩蔽干扰离子,测定了硅铝催化剂中的微量钯,结果满意。
In this paper, the analytical properties of Pd (Ⅰ), l, 10-phenanthroline and o-carboxyphenyldiazoaminoazo were studied. The results showed that the sensitivity of the color reaction was high in the presence of non-ionic surfactant Tween 80 and Na_2B_4O_7-NaOH at pH 10.0. The maximum absorption wavelength of the complex was at 520 nm and the apparent molar absorptivity was 1.0 × 10-5L · mol -1 · cm -1. Beer’s law was obeyed when the concentration of Pd (Ⅰ) was between 0 ~ 12μg / 25ml. The interference ions were masked by EDTA and potassium sodium tartrate, and the trace palladium in the silica-alumina catalyst was determined. The results were satisfactory.