The Extraction of Caffeine from Tea:: An Old Undergraduate Experiment Revisited

• Scott D. Murray ^[1] ; Peter J. Hansen ^[1]
  1. [1] Northwestern College

     Northwestern College

     City of Chicago, Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 72, Nº 9 (September), 1995, págs. 851-852
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • The extraction of caffeine from tea leaves is a common organic chemistry experiment. A water/1-propanol/sodium chloride ternary system was found to be a suitable replacement for the more traditional water/organochlorine solvent systems. Approximately 80% of the caffeine in the tea leaves can be recovered as crude caffeine. The ternary system employs chemicals which are not only less expensive, but also less toxic.