改性沸石催化剂中镓的测定BTAPC-Ga(Ⅲ)显色体系的研究

Study on Colour Reaction of Ga(Ⅲ)with Benzothiazolylazo-pyrocatechol for Determination of Ga(Ⅲ)in Modified HZSM-5 Catalysts

研究了 Ga(Ⅲ)与 BTAPC 显色反应,确定了络合物组成为1∶3,表观摩尔吸光系数为1.22×10~5,提出一个简便、灵敏的分析方法,用于改性沸石催化剂中镓的测定,获得了满意的结果。

A simple and sensitive method for the spectrophotometric determination ofGa(Ⅲ) has been developed.Optimum conditions for determination,linear calibra-tion range and interference of various foreign ions are reported.The compositionof complex is 1∶3,the apparent molar absorptivity is 1.22×10~5 1mol^(-1)cm^(-1).Theproposed method has been applied to the determination of Ga(Ⅲ) in modifiedHZSM-5 catalyst with satisfactory results.