镓的高灵敏体系分光光度研究及其应用

Studies on the Highly Sensitive Colour Reaction of Ga (Ⅲ) with 9-Pyridine 2,3,7-Trihydroxyfluorone and its Application

本文测定了9-吡啶基荧光酮的酸度常数,研究了试剂与Ga(Ⅲ)的显色反应条件。结果表明,在表面活性剂存在下,pH8.4～9.0范围内形成蓝紫色络合物,其组成比为1:4,摩尔吸光系数为2.98×10~5,是测定Ga(Ⅲ)的高灵敏方法。许多金属离子的干扰经乙酸丁酯萃取分离以消除之。本法已用于测定催化剂中微量镓获得较好的结果。

A highly sensitive method for the spectropliotometric determination of Ga(III)with 9-pyridinefl-uorone in the presence of CTMAB has been developed.The optimum condition for the determination are reported. The method has been applied to the determination of trace Ga(III)in the catalyst and satisfatory results were obtained.