论文部分内容阅读
前文(5-Br-PADAP/CPB胶束增溶光度法测定矿石中铀,本刊,1984年6期p.33)所报告的方法中,当低于18℃时,CPB析出结晶。为此,在实践中又作了改进:于显色体系中引入乳化剂OP。从而,既保持了原法的灵敏度和选择性,又使显色体系即使低至4℃时仍呈均相。用改进后的方法测矿石中铀的程序如下: 按前文溶样并制成硝酸浓度为0.2N的50毫升试液。分液2～5毫升(使铀不大于60微克)于25毫升量瓶中,补加0.2N硝酸至5毫升,依次加入pH～8的
In the previously reported method (5-Br-PADAP / CPB micellar solubilization spectrophotometry for the determination of uranium in ore, Journal, 6, 1984, p.33), CPB precipitates and crystallizes below 18 ° C. To this end, in practice has made improvements: the introduction of emulsifier OP color system. Thus, while maintaining the original method of sensitivity and selectivity, but also to the color system even as low as 4 ℃ when still homogeneous. The procedure for the determination of uranium in ore using the improved method is as follows: Prepare a 50 ml test solution of nitric acid at a concentration of 0.2 N according to the previous example. Dispense 2 ~ 5 ml (uranium not more than 60 micrograms) in 25 ml volumetric flask, add 0.2 N nitric acid to 5 ml, followed by the addition of pH ~ 8