摘要
以0.4 mol/L HCl 溶液作介质,在表面活性剂 CTMAB 存在下,钼(Ⅵ)与新试剂3,5-二溴-4-二甲氨基过溴化物苯基荧光酮(DBDMBPF)显色反应形成1:2的红色三元胶束配合物,最大吸收波长位于533 nm 处,表观摩尔吸光系数ε为1.05×10~5 L·mol^(-1)·cm^(-1),钼(Ⅵ)含量在0～12 μg/25 mL 范围内符合比尔定律,拟定方法用于钢铁样品中微量钼的测定,结果满意.
In the presence of CTMAB,colour reaction of molybdenum with DBDMBPF is studied.In the medium of 0.4 mol/L HCl,molybdenum reacts with DBDMBPF to form a 1:2 red ternary micel|e complex.The maximum absorption of complex is at 533 nm.The molar absorptivity is 1.05×10~5 L·mol^(-1)·cm^(-1).Beer's law is obeyed up to 12μg of Mo(Ⅵ)in 25 mL.The method can be used for the determination of trace molybdenum in steel alloys with satisfactory results.
基金
湖北省教委重点科研基金
关键词
DBDMBPF
显色反应
钼
分光光度法
[(3,5-Dibromo-4-dimethylamino)perbromide ] phenylfluorone
Molybdenum
Spectrophotometry
