间羧基偶氮氯膦光度法测定矿石中微量钪  

Spectrophotometric Determination of Micro Amounts of Scandium in Minerals and Rocks with Chlorophosphonazo-mK(CPA-mK)

作　　者：胡有云 潘教麦 Hu Youyun;Pan Jiaomai

机构地区：[1]中国有色金属矿产地质研究院 [2]上海华东师大化学系

出　　处：《岩矿测试》1986年第2期144-145,I0012,共3页Rock and Mineral Analysis

摘　　要：间羧基偶氮氯膦(简称CPA—mk)曾用于钢中铈族稀土的测定。本文研究了试剂与钪形成有色络合物的条件。在0.12~0.48mol/L盐酸介质中,于610和660nm处有两个吸收峰,摩尔吸光系数为4.0×10^(4),Sc:CPA-mk为1:2,25毫升中0~10微克ScO符合比尔定律。Scandium forms a blue complex with CPA-mK in a 0.12-0.48 mol/L HC1 medium.The maximum absorption is at 610 and 665 nm,molar absorptivity being 4.0×10^(4)L mol^(-1)cm^(1-).The complex is found to be Sc:CPA-mK=1:2 by methods of continuous variation,molar-ratio and equilibrium shift.Beer’s law is abeyed for solution containing 0-10μg Sc_(2)O_(3)in 25 ml of solution.PMBP-n-butyl acetate extraction was used in the method to separate accompanying elements.Satisfactory results were obtained in the determination of micro amounts of scandium in minerals and rocks.

关 键 词：摩尔吸光系数 比尔定律 盐酸介质 间羧基偶氮氯膦 CPA 吸收峰 

分 类 号：O65[理学—分析化学]