Abstract:Based on the fluorescent complex between Ga(Ⅲ) and the reagent of 7 (8 hydroxy quinoline 5 sulfoacid azo) 8 hydroxy quinoline 5 sulfoacid(8Q5SA8Q5S),which was formed in 1∶3 type at pH 1.4,a new fluorescence method for determination of Ga(Ⅲ) is describe