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 ...