9-对氟苯基萤光酮和溴化十六烷基三甲基铵分光光度法测定锗  

Spectrophotometric Determination of Germanium With-9-(o-Fluophenly)-2,6,7-triehydroxyxanthen-3-one and Cetyltrimethylammonium Bromide

作　　者：姚川[1] 许光惠[2] 王振清[2] 

机构地区：[1]中国医药研究开发中心,北京102206 [2]南开大学化学系

出　　处：《分析化学》1991年第5期545-548,共4页Chinese Journal of Analytical Chemistry

摘　　要：硫酸与磷酸混合介质中(1.2mol/L H_2SO_4+0.6mol/L H_3PO_)锗 CTMAB 与9-对氟苯基萤光酮反应产生橙黄色产物,其λ_(max)为505nm,反应具有很高的选择性和灵敏度,摩尔吸光系数达1.50×10~5L·mol^(-1)·cm^(-1)。除个别高价金属离子,其它各种离子均不干扰锗的测定。本文拟定了用9-对氟苯基萤光酮分光光度法不经仟何分离或富集直接测定岩石和矿物中微量锗的方法。A highly sensitive and selective spectrophotometric method has been developed for the determination of germanium in a strong acid medium(1.2mol/L H_2SO_4+0.6 mol/L H_3PO_4)using 9-(o-fluophenyl)-2,6,7-trihydroxyxanthen-3-one in the presence of cetyltrimethylammonium bromide.The germanium complex exhibits absorption maximum at 505nm,and has a molar absorptivity of 1.5×10~5 L·mol^(-1)·cm^(-1)·Beer's law is obeyed in the range of 0～8.8μg/25ml for germanium,and the method is relatively free from inter- ference of other ions.The method can be used to determine microamounts of germanium in minerals,and ores without any separation.

关 键 词：锗 测定 对氟苯基 萤光酮 

分 类 号：O614.432[理学—无机化学]