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变色酸双偶氮类试剂是近十多年来新崛起的一种高灵敏度和高选择性的光度显色剂。在稀土元素的光度分析方面,变色酸双偶氮衍生物比单偶氮衍生物更有实用价值。而在变色酸双偶氮衍生物中,它对稀土元素的分析性能又以不对称型显色剂优于对称型显色剂。我国分析工作者在不对称变色酸双偶氮类稀土显色剂的研制和应用方面进行了不少工作,也取得了一些新的成果。作者在以往对不对称变色酸双偶氮氯膦型显色剂系统研究的基础上,继续保留主要分析
Chromotropic acid disazo agent is a newly emerging high sensitivity and high selectivity photochromic agent in recent ten years. In the photometric analysis of rare earth elements, the chromotropic acid disazo derivatives are more practical than monoazo derivatives. In the chromotropic acid disazo derivatives, its analysis of rare earth elements in turn asymmetric color developer is superior to the symmetrical color developer. China’s analysts have done a lot of work in the development and application of asymmetric chromotropic acid disazo rare earth developers, and have also made some new achievements. Based on the previous studies on asymmetric chromotropic acid chromogen-based developer system, the author continued to keep the main analysis