4,5-二溴邻硝基苯基荧光酮光度法测定微量镓  

Spectrophotometric determination of trace gallium with 4, 5-dibromo 2-nitro-phenylfluorone

作　　者：黄美新[1] 蔡康旭[1] 刘小春[1] 

机构地区：[1]湘潭工学院资源工程系,湖南湘潭411201

出　　处：《冶金分析》2001年第2期17-18,6,共3页Metallurgical Analysis

摘　　要：研究了镓与 4,5 二溴邻硝基苯基荧光酮 (DBON PF)的显色反应 ,在盐酸—氯化钾介质中 ,有CTMAB存在下 ,显色反应灵敏 ,镓与DBON PF络合物的最大吸收波长在 75 7nm ,络合物的表观摩尔吸光系数ε =8 2× 10 4。含镓 0～ 5 μg/ 2 5mL遵守比耳定律。用乙酸丁酯萃取分离干扰元素 ,可以大大提高方法的选择性。该法用于矿石中微量镓的测定 ,获得了满意的结果。The colour reaction of gallium? with 4, 5 dibromo 2 nitro phenylfluorone(DBON PF) was investigated. In the medium of HCl KCl solution containing CTMAB the colour reaction is sensitive. The complex of Ga? with DBON PF has a maximum absorption at 575nm. The apparent molar absorptivity is 8.2 ×10 4 L·mol -1 ·cm -1 . Beer's law is obeyed for 0-5μg gallium in 25mL solution. The interference of foreign ions was eliminated by extraction with n butyl acetate. The method has been applied to the determination of trace gallium in ore with satisfactory results.

关 键 词：镓 二溴邻硝基苯基荧光酮 分光光度法 测定 矿石 

分 类 号：O657.3[理学—分析化学]