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一、概述本世纪五十年代发展起来的动力分析法,特别是催化分析,已在生物化学、临床化学和其他方面得到广泛应用。近年关于微量铜的催化分析作了不少研究。其中有:Cu(Ⅱ)对Fe(Ⅲ)-硫脲反应或Fe(Ⅲ)-甲基硫脲反应,Cu(Ⅱ)对过氧化氢氧化氢醒或氧化靛胭脂以及Cu(Ⅱ)对Fe(CN)_6~(3-)-CN~-氧化还原反应的催化作用等。在多数情况下,干扰(如Hg(Ⅱ))难以排除,有的终点观测困难。本文提出的方法是根据Cu(Ⅱ)对反应的催化作用。为了能准确观测反应终点,我们在Fe~(3+)-S_2O_3~(2-)体系
I. Overview Dynamic analysis developed in the 1950s, especially in catalysis, has been widely used in biochemistry, clinical chemistry and other fields. In recent years, a small amount of copper on the catalytic analysis made a lot of research. Among them, the reaction of Cu (Ⅱ) with Fe (Ⅲ) -thiourea or with Fe (Ⅲ) -methylthiourea, the reaction of Cu (Ⅱ) with hydrogen peroxide hydrogen peroxide or indigo carmine, (CN) _6 ~ (3 -) - CN ~ - redox reaction. In most cases, interference (such as Hg (II)) is difficult to rule out, and some endpoints are difficult to observe. The proposed method is based on the catalytic effect of Cu (II) on the reaction. In order to accurately observe the end of the reaction, we in the Fe ~ (3 +) - S_2O_3 ~ (2-) system