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关于铜氨液的快速分析,报道甚多,文献指出有些方法在定量关系上存在一定的问题。快速分析法都基于酸碱中和滴定,而酸碱滴定的问题,实质上是一个质子转移的问题。对酸碱滴定法原理的分析,就应该围绕体系中质子转移的问题进行考虑。关于这方面的基本理论已有很多专门著作,这里只对铜氨液的快速分析法进行简要的分析,并介绍我们建立的方法。一铜氨液中总氨的测定铜氨液中主要成分是:[Cu(NH_3)_2]Ac、[Cu(NH_3)_4](Ac)_2、(NH_4)_2CO_3、NH_4Ac、NH_3·H_2O。在快速分析法中,往往是先用过氧化氢氧化一价铜离子,并加入EDTA络合掩蔽铜,以使其中的氨以(NH_4)_2CO_3,NH_4Ac、NH_3·H_2O三种形式存在。由于它们的共存,
There are many reports on the rapid analysis of copper ammonia solution, the literature pointed out that some methods have some problems in the quantitative relationship. Rapid analytical methods are based on acid-base neutralization titration, and acid-base titration problem, in essence, is a proton transfer problem. The analysis of the principle of acid-base titration should be considered around the proton transfer in the system. There are a lot of specialized works on the basic theory in this field. Here we only briefly analyze the rapid analysis method of cuprammonium solution and introduce the method we established. The determination of total ammonia in a copper ammonia solution The main components in the copper ammonia solution are: [Cu (NH_3) _2] Ac, [Cu (NH_3) _4] (Ac) _2, (NH_4) _2CO_3, NH_4Ac, NH_3_H_2O. In rapid analysis, it is often the first use of hydrogen peroxide oxidation of monovalent copper ions, and EDTA complexation masking copper, so that the ammonia to (NH4) _2CO_3, NH4Ac, NH3 H_2O three forms exist. Due to their coexistence,