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Cromatografia em camada fina de extratos de três quimiotipos de Lippia alba (Mill) N.E.Br. (erva-cidreira)

The present work shows the thin layer chromatography of the essential oils, the ethanolic extract and the dicloromethane extract obtained from leaves of three chemotypes of Lippia alba. The chemotypes were denominated chemotype I, II and III for the differences in the majoritary compound of their essential oils: citral, carvone and linalol, respectivelly. The oil and the extracts were compared with standards of citral, carvone and linalool. Ethanol and dicloromethane can be used for extraction since both extracts have similar cromathografic profiles. There was no diference between extracts of fresh and dried leaves. The results show a fast and eficcient identification of the three chemotypes by thin layer cromatoghraphy.


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