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测定少量锗的较好的方法是用苯基氧杂蒽酮(?)比色法,它具有大的灵敏度,而且并不复杂.笨基氧杂蒽酮(9-笨基-2,3,7-三烃基-6氧杂蒽酮)试剂和四价锗在酸性溶液中组成红色的络合物沉淀而析出.在络合物里,每一个锗原子需要与试剂的二个分子相结合.和锗含量很少的情形下,沉淀组成悬浮体,加入保护胶质能够使之稳定.在这种情形下,溶液的颜色变化由不存在锗时的纯黄色(试剂酸性溶液的颜色),经过各种色度的橙黄色到锗含量大时的玫瑰红色.
A preferred method for the determination of a small amount of germanium is the phenylxanthone (?) Colorimetric method, which has great sensitivity and is not complicated. The stupid xanthone (9-stupid-2,3, 7-trialkyl-6-xanthracene) reagent and tetravalent germanium precipitated and precipitated as a red complex in an acidic solution, where each germanium atom needs to be bound to two molecules of the reagent. In the case of low germanium content, the precipitate forms a suspension which is stabilized by the addition of a protective colloid, in which case the color change of the solution is determined by the pure yellow (color of the reagent acid solution) in the absence of germanium, Various colors of orange yellow to germanium content of large rose red.