罗丹明6G·四溴荧光素双显色体系浮选光度法测定锗的研究  

Determination of Germanium with Tetarbromofluorescein and Rhodamine 6G Double-Chromogenic System by Flotation Spectrophotometry

作　　者：刘保生[1] 

机构地区：[1]河北大学理化分析中心,保定市合作路1号071002

出　　处：《光谱实验室》1997年第3期64-66,共3页Chinese Journal of Spectroscopy Laboratory

摘　　要：向锗与茜素氨羧络合剂（ALC）罗丹明6G（R6G）形成的Ge（ALC），（R6G）5甲苯浮选物中，加人0．1mol／L的NaOH溶液，使R6G离子进入水相，并向其中加入与R6G颜色相同的四溴荧光素（TBF），形成等色染料离子对R6G＋·TBF-再被甲苯浮选。将浮选物溶于丙酮，于530nm处进行光度测定．由于10个染料分子同时吸光，使本方法具有很高的灵敏度；ε＝5．8×105L·mol－1·cm－1，锗含量在0．004—0．1mg／L眼从比耳定律。回收率为96．7％—103．8％，相对标准偏差不大于4．4％，用于蔬菜中痕量锗的测定，得到满意的结果。Rhodamine 6G(R6G) are produced and enter into the aqueous phase when 0. 01mol/L NaOH so-lution is added to the Ge (ALC )3 (R6G)5 (ALc: Alizarin complexone ) by toluene notation. And then RSG. TBF ts flotated by tetrabromonuorescein (TBF)' Disso1ve the flotation in acetone and meas-sure the absorbance of the solution at 530nm The sensitwity is raised because of the ten dyes (Ge:R6G: TBF = 1: 5: 5) assistant effect The mofor absorptvity of this method is 5.8×105L. mol-1 cm-1. Beer's law is obyed in the range of 0. 004- 0. 1mg/L with a relative standard deviation of 4. 4 %' The method is applied satisfactoily to the determination of germanium in vegetables.

关 键 词：锗 罗丹明6G 四溴荧光素 浮选光度法 

分 类 号：O614.431[理学—无机化学] O657.3[理学—化学]