摘要
本文报道用了2,6-二氯-4-溴偶氮胂作显色剂测定微量铀(Ⅵ)的光度法。在H_2SO_4介质中,铀(Ⅵ与)2,6-二氯-4-溴偶氮肿形成1:2络合物,其λ_(max)=640nm;表观摩尔吸光系数为1.1×10~5L·mol^(-1)·cm^(-1),铀的浓度在0.0~22.0μg/ml内符合比耳定律。方法具有灵敏度高、选择性好、操作方便等特点并已用于废水及矿样中微量铀(Ⅵ)的测定。
A spectrophotometric method for the determination of trace amounts of uranium (Ⅵ) with 2, 6-dichloro-4-bromo-arsenazo (CBA) has been reported. Uranium (Ⅵ ) reacts with CBA to form a 1 : 2 stable complex in H_2SO_2 medium. The apparent molar absorptivity of the complex is 1.1× 10~5 L ·mol^(-1) ·cm^(-1) at 640 nm, Beer' s law is obeyed in the range of 0. 0-22. 0 μg/25 ml for uranium. The method is sensitive, selective and simple, and can be applied to the determination of uranium in waste water and ores with satisfactory results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1994年第12期1223-1225,共3页
Chinese Journal of Analytical Chemistry
关键词
铀
分光光度法
二氯溴偶氮胂
Uranium, 2,6-Dichloro-4-bromo-arsenazo, Spectrophotometry.