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在开发和利用稀土资源的过程中,对稀土元素的光度测定提出了更高的要求,不仅要能测定稀土总量,而且要求能测定混合稀土中的轻重稀土分量。特别针对我省的实际,还要求测定单个稀土元素——钇的含量。文献报导,利用偶氮氯膦Ⅲ与稀土的β型显色反应,在PH1.8～2.4的酸度下,用NaF和Zn—EDTA作掩蔽剂,可以测定钇的含量。偶氮氯膦mN与钇组稀土能形成β型反
In the process of development and utilization of rare earth resources, higher requirements are set for photometric determination of rare earth elements, not only the total amount of rare earth can be determined, but also the determination of the light and heavy rare earth components in the mixed rare earth. In particular, the reality for our province, but also requires determination of a single rare earth element - yttrium content. Reported in the literature, the use of chlorophosphonazo Ⅲ and rare earth β-type color reaction, pH1.8 ~ 2.4 acidity, with NaF and Zn-EDTA masking agent, you can determine the content of yttrium. Chlorophosphonazo mN and yttrium group of rare earth can form β-type anti