Demixing effects in thin-layer chromatography with NH2-modified silica gel precoated plates |
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| Authors: | L. Zlatanov C. Gonnet M. Marichy |
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| Affiliation: | (1) State Institute for Drug Control, Zaimov Street 26, Sofia, Bulgaria;(2) Laboratoire des Sciences Analytiques (U.A. 04.0435, J. M. Mermet), Université Claude Bernard, Lyon I, 43 boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France |
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| Abstract: | Summary Demixing effects in thin-layer chromatography have been investigated with NH2-modified silica gel precoated plates and for frequently used hydroorganic binary solvents of various compositions with salt addition.The position of the solvent demixing front depends on: (1) solvent composition, (2) nature of the organic modifier and (3) salt concentration. Whatever the organic modifier, for a given water percentage in the developing solvent, solvent demixing is found to occur at the same concentration of NaCl. |
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| Keywords: | Thin-layer chromatography Amino-bonded silica Demixing effects |
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