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氧化-还原色层法是色层分离法的一个分支。此方法是作为物质分离和分析的手段在六十年代提出来的。迄今在这方面所做的工作仍极为有限,而且多局限于某些变价离子间的相互分离方面。继文献的工作之后,我们着重研究了氧化-还原色层法在高纯物质制备中的应用,目前已有了一定的进展。比如,用此方法分离硫酸锌等盐类中的微量杂质——Fe、Mn、Pb等,都得到了良好的结果。与化学沉淀法相比,氧化-还原色层法不仅可将硫酸锌、硫酸镉等无机盐中的Fe、Mn和Pb等微量杂质提纯到发光纯的纯度,而且工序少、操作方便。另外,由于整个提纯过程在管道中进行,受外界大气污染的机会少,因而被提纯物质的质量稳定。
Oxidation - reduction chromatography is a branch of chromatographic separation. This method was proposed in the 1960s as a means of material separation and analysis. The work done so far in this area is still extremely limited and is mostly limited to the separation of certain variable-price ions. Following the work of the literature, we have focused on the application of oxidation-reduction chromatography in the preparation of high purity materials, and some progress has been made so far. For example, using this method to isolate trace impurities such as zinc sulfate and other salts - Fe, Mn, Pb, etc., have been good results. Compared with the chemical precipitation method, the oxidation-reduction chromatography method can not only purify trace impurities such as Fe, Mn and Pb in inorganic salts such as zinc sulfate and cadmium sulfate to the pure purity of light, but also has fewer steps and is convenient to operate. In addition, due to the entire purification process carried out in the pipeline, less chance of contamination by the outside air, so the quality of the purified material is stable.