反相纸层析与液液萃取

本文探讨了反相纸层析与液液萃取的关系,首先对Cerrai,E.提出的萃取色层两种滞留机制的理论,即离子交换与分配机制,提出不同的看法。认为q=1的现象是As变化的结果而与机制无关。本文认为当固定相为液体或溶液时,反相纸层析与液液萃取一样属于分配机制。这样反相纸层析对萃取工作可以提供有益的信息,它的R_f图谱可以作为一种简便地、快速地筛选萃取剂的工具。此外选择适当的条件,它还可以用来研究萃取机理。

INORGANIC REVERSED-PHASE PAPER CHROMATOGRAPHY AND LIQUID-LIQUID EXTRACTION

The relation of reversed-phase paper chromatography and liquid-liquid extraction is studied in this paper. Our conclusion is contrary to the conception of Cerrai, E. who assumed that there are two kinds of retention mechanism, i. e., exchange and partition in extraction chromatography. We find that the phenomena q=1 is the result of the variation of A, and is not related to the retention mechanism. When the stationary phase is a liquid or a solution partition mechanism governs the retention of reversed-phase paper chromatography just as in liquid-liquid extraction. Therefore, the result of reverssd-phase paper chromatography may give information of liquid-liquid extraction and the Rf patterns may be used as a simple and rapid method to estimate the ability of the extractant. Moreover, by choosing suitable condition, it can also be used to study the mechanism of extraction.