Flotation-spectrophotometric determination of trace of germanium with isochromatic dye ion-pairs formed by rhodamine 6G and tetrabromofluorescein

摘要

A flotation spectrophotometric method for the determination of germanium with isochromatic dye ion-pairs is described. The molar ratio of germanium to rhodamine 6G to tetrabromofluorescein is 1∶5∶5. The apparent molar absorptivity is 5.8×l0↑(5) I mol↑(-1) cm↑(-1) at 531 nm. Beer's law is obeyed over the concentration range of 5.0×10↑(-8)-1.25×10↑(-6) mol 1↑(-1). The proposed method is sensitive and accuracy and can be applied satisfactorily to the determination of germanium in vegetables. # 1997 Elsevier Science B.V.