par Lacourt, Alice ;Sommereyns, Ghislaine ;De Geyndt, Ed;Jacquet, Od
Référence Mikrochimica acta, 36-37, 1, page (117-132)
Publication Publié, 1951-03
Article révisé par les pairs
Résumé : 1. The cations studied (Fe, Ti, Al, V, Ni, Co, Cu) in the form of their chlorides, when chromatographed on paper (Whatman Nr. 1 or 4) produced chromatograms when developed (downward development) by means of organic solvents. 2. For the same solvent, the speed of diffusion of the cations through the support varies from case to case, a fact which makes separations possible. 3. The time required for the establishment of chromatographic equilibrium in mineral is much less than in organic mixtures: 45′; 60′; 240′ in inorganic; from 8 to 24 hours in the separation of aminated acids. 4. Some qualitative as well as quantitative separations in different proportions have been accomplished. 5. These chromatographies are of interest in the case of laborious chemical separations. From the industrial point of view, they have considerable interest for the control and determination of traces of impurities in the rare elements or those elements required in a high state of purity. From this standpoint, the investigation is being continued to discover the limits of usefulness of the separations tried thus far, and notably with other proportions of cations. 6. From the point of view of control, it has been found that the course of a chromatogram may be altered by the addition of minimum quantities of organic liquids to the solvent. This fact may be useful in revealing impurities in the organic solvents and even for their determination. 7. Chromatography appears to be very simple and clean. It has the advantage of requiring the chemists' attention for only part of the time; the separations continue without his intervention. 8. The authors believe that this technique will be used to a great extent in the future both in research and industrial application. © 1951 Springer-Verlag.

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