锗是典型的稀散元素,一般伴生于岩石矿物之中,其含量很低,需要有个灵敏的测定方法,目前仍普遍采用苯芴酮萃取比色法。近年来鉴于许多文献的报导锗与含有 或基团的有机试剂能形成络合物的分析特征,我们选择了几种有机试剂(如溴邻苯三酚红、苯芴酮、变色酸、茜素—S)进行条件试验。发现锗与茜素—S络合物在各种支持电解质中PH2.5-2.6左右,均有对称性良好的导数示波极谱波。峰电位约 Germanium is a typical sparse element, usually associated with rock minerals, its content is very low, the need for a sensitive assay, is still commonly used benzene fluorenone extraction colorimetric method. In recent years, in view of the fact that many of the literature reports that germanium and the organic reagent containing a group or group can form an analytic characteristic of a complex, we have selected several organic reagents such as bromopyrogallol red, benzofluorenone, chromotropic acid, alizarin -S) for conditional testing. It was found that germanium and alizarin-S complexes have a symmetrical good derivative oscillopolarographic polarography in various support electrolytes at pH 2.5-2.6. Peak potential about