Thin-Layer Chromatography Experiments That Illustrate General Problems in Chromatography
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M. Lederer [1] ; E. Leipzig-Pagani [1]
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[1] University of Lausanne
University of Lausanne
Lausana, Suiza
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- Localización: Journal of chemical education, ISSN 0021-9584, Vol. 73, Nº 10 (October), 1996, págs. 974-976
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
A number of chromatography experiments using cellulose thin layers and aqueous eluents are proposed to illustrate:
1. How chromatography can be used for "pattern recognition" of the inks of felt-tip pens.
2. The principle of displacement chromatography of the constituents of the antiseptic Mercurochrome.
3. Salting-out chromatography for the separation of halides using a nearly saturated ammonium sulfate solution as eluent.
4. The impossibility to use chromatography alone as a method of identification: Methyl Orange travels differently in presence and absence of cyclodextrins or starches in the sample to be analysed.
