三羟基荧光酮类试剂电化学行为的研究Ⅰ．镓（Ⅲ）、铟（Ⅲ）与对氨基苯基荧光酮配合物的极谱行为及镓和铟的同时测定

Studies on the Electrochemical Behaviour of Trihydroxyfluorones I.The Polarographic Behaviour of Gallium and Indlum with p－Aminophenylfluorone──Simultaneous Determination of Trace Gallium and Indium

在ＨＣｌ－Ｋｃｌ和聚乙烯醇介质中，用单扫示波极谱法得到了两个灵敏的镓（Ⅲ）、铟（Ⅲ）和对氨基苯基荧光酮配合物的吸附波。两波的峰电位依次为－１．０Ｖ和－０．６５Ｖ（ｖｓ．ＳＣＥ），线性范围：镓（Ⅲ）０．００８～０．６μｇ／ｍｌ，而铟（Ⅲ）０．００１～０．３μｇ／ｍｌ。用于矿石中镓和铟的直接测定，结果满意。文中还探讨了有关反应机理。

In a supporting electrolyte of HCl-KCl－PVA， two sensitive adsorptive waves of Ga（Ⅲ）－and In（Ⅲ）-p-aminophenylfluorone complexes have been obtained by single-sweep polarog-raphy．The peak potentials of tha two waves were-1．0V and-0．65V（vs.SCE），respectively．The peak height of adsorptive wave was linear with the concentration for the given range of gallium（0．008－0．6μg／ml）and indium（0．001-0．3μg／ml）． This method proposed has been used well for simul-taneous determination of trace gallium and indium in ores． The mechanism of related reactions was discussed.