偶氮氯磷-mN-二苯胍-溴化十六烷基吡啶胶束增溶分光光度法测定岩矿中微量铈组稀土

Direct Spectrophotometric Determination of Microamount of Cerium group Rare Earth in Minerals and Rocks with Chlorophosphonazo-mN Dibenzyl Guanidine

随着稀土矿石分析工作的需要,对铈组稀土的分析测试要求越来越高,不仅要求灵敏度要高,而且选择性要好。长碳链季胺盐表面活性剂在胶束增溶光度法中的增色作用,为使此显色剂在测定组份较复杂的矿石中铈组稀土的灵敏度和选择性进一步提高。

This paper presents a direct rapid spectrophotometric method to determine the cerium-group rare earth in minerals and rocks with chlorophosphonazo-mN dibenzyl guanidine as developing reagent. Citric acid, sodium dihydrogen phosphate, EDTA and TTHA were used as masking agents for 22 foreign ions.