4,5-二溴苯基荧光酮分光光度法测定有机锗口服液中锗

Spectrophotometric Determination of Germanium in Organic Germanium Oral Liquid with 4,5-Dibromophenylfluorone

在5．3mol·L－1的H2SO4介质中．锗与4．5-二溴苯基荧光酮，十二烷基硫酸钠生成三元配合物。其λmax为509nm，表观摩尔吸光率为1．77×105L·mol-1·cm-1．锗量在0～7μg／25mL遵守比耳定律。显色反应具高选择性，各种低价和高价金属离子均不干扰测定。测定了有机锗口服液中微量锗。

The ternary complex Ge-DBPF-SDS is formed in 5. 3 mol. L-1 H2SO4 medium. The maximum absorption of the complex is at 509 nm and apparent molarabsorptivity is 1. 77×105 L . mol-1·cm -1. Beer's law is obeyed in the range of 0~ 7 μg/25 mL of Ge. The colour reaction is relatively free from interference of other ions.It has been used to determine nlicroamounts of Ge in organic germanium oral liquid directly.