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本文研究了镨的极谱吸附催化波行为，发现在含有氯化铵支持电解质的溶液中，错能够同茜素红Ｓ形成络合物，在ｐＨ＝３５±０．２时能产生一个良好而又灵敏的吸附催化波，其催化电流的大小与镨的浓度成正比（浓度０００２～１０μｇ·ｍｌ￣（－１）），在ＭｏｄｅｌＰＡＲ－３８４Ｂ－４极谱分析仪上，催化波的峰电位在－１．８７伏（ＶＳ·８·Ｃ·Ｅ）．干扰离子可用沉淀法与镨进行分离，这个方法已应用到稀土矿石中痕量镨的测定，并获得了满意的结果。
In this paper, we studied the polarographic catalytic catalysis wave behavior of praseodymium and found that the complex can form complex with alizarin red S in the solution containing ammonium chloride supporting electrolyte, which can produce a good The catalytic current is proportional to the concentration of praseodymium (concentration 0002 ~ 10μg · ml ~ (-1)). In the ModelPAR-384B-4 polarographic analyzer, the peak potential of the catalytic wave is in the range of -1.87 V (VS · 8 · C · E). The interfering ions can be separated from praseodymium by precipitation method. This method has been applied to the determination of trace praseodymium in rare earth ores with satisfactory results.