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为微量稀土元素的光度测定已提出多种类型的有机显色剂,其中之一就是变色酸双偶氮衍生物。经常在分析工作中应用的偶氮胂Ⅲ、偶氮氯膦Ⅲ、双羧基偶氮胂Ⅲ、偶氮胂 M、偶氮硝羧等均属于这一类化合物。我国特效有机显色剂的研制和生产与国外先进国家相比无论在品种和质量上都有很大差距,特别是在设计一些国外没有的新的结构方面。为了寻求适合微量稀土元素分析要求的灵敏度高、选择性好的显色剂,我们对偶氮氯膦Ⅲ的结构进行了一些改造,既
A number of types of organic chromogenic agents have been proposed for the photometric determination of trace rare earth elements, one of which is the chromotropic acid disazo derivative. Often used in the analysis of arsenazo Ⅲ, chlorophosphonazo Ⅲ, dicarboxyarsenazo Ⅲ, arsenazo M, azocarboxylate, etc. belong to this class of compounds. The development and production of special effect organic color developing agent in our country have a great disparity in variety and quality compared with foreign advanced countries, especially in the design of some new structures that are not available in foreign countries. In order to find suitable high sensitivity and selective chromophores for the trace rare earth element analysis, we have made some modifications to the structure of chlorophosphonazo III, both