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本文研究了五个结构新颖的显色剂与稀土元素的显色反应。其中的二溴羧基偶氮氯肿(CAsA-DBK)与稀土元素反应具有对比度大、灵敏度高、选择性好等优点。在0.6mol/LHClO_4介质中,不加任何掩蔽剂条件下,只与铈组稀土显色,与钇组稀土几乎不显色,是一个较有特色的铈组稀土试剂。
In this paper, the color reaction of five novel chromogenic agents with rare earth elements has been studied. One of the dibromocarboxylazosulfur (CAsA-DBK) and rare earth elements with large contrast, high sensitivity, good selectivity and so on. In 0.6mol / LHClO_4 medium, without any masking agent, only with cerium group rare earth color, and rare earth yttrium group almost no color, is a more characteristic rare earth cerium reagent.