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1 前言偶氮氯膦—mK 是一种不对称变色酸双偶氮化台物,学名为2—(4—氯—2—膦酸笨偶氮)—7—(3—羧基苯偶氮)—1,8—2羟基萘—3,6—2磺酸,结构式为:可简写成CPA—mK,它是测定稀土元素含量的高灵敏度显色剂之一,报道双偶氮类显色剂与稀土元素显色反应的文章较多,但偶氮氯膦—mK 与稀土元素显色反应的研究,特别是CTMAB—OP 混合表面活性剂对其显色反应的影响尚未见有报道.本文探讨了在盐酸介质中乳化剂OP 及CTMAB—OP 混合表面活性剂对稀土元素与偶氮
1 Introduction Chlorophosphonazo-mK is an asymmetric chromotropic acid disazo compound, scientific name is 2- (4- chloro-2-phosphonobenzonium) -7- (3-carboxyphenyl azo ) -1,8-2 hydroxynaphthalene-3,6-2 sulfonic acid, the formula is: can be abbreviated as CPA-mK, which is one of the high sensitivity of the determination of rare earth elements chromogenic agents, reported azo-based color There are many articles about the color reaction of rare earth elements and rare earth elements, but the research on the color reaction of chlorophosphonazo-mK and rare earth elements, especially the influence of CTMAB-OP mixed surfactant on its color reaction has not been reported yet. The effects of emulsifier OP and CTMAB-OP mixed surfactant in hydrochloric acid medium on the properties of rare earth elements and azo