Isolation of Caffeine from Teabags

Isolation of caffein from Teabags by: Ma. Jessa Princess T. Romero John Jezreel Pardinas Submitted to: Mrs. Georgina Diopenes Abstract In this try out, Caffeine was isolated from Tea, apply bouncy wet, atomic number 11 change, dichloromethane, and was thusly purified using sublimation. The crude weight of caffein was 0.048 grams. The experimental melt stopover in the 1st exertion was 210 0C 218 0C, in the second trial was 212 0C 220 0C. Introduction Caffeine is a molecule that is alike to the purine base xanthine. The solitary(prenominal) recognizable difference is that caffeine has a methyl group group. The destination of this experiment is to isolate caffeine from tea leaves, and indeed meliorate it by using sublimation. This experiment will theatrical role cardinal techniques, extraction, recrystallization and melting point determination. A sequence of extractions has to be make to take out the other components from tea. Caffeine is a pictorial compound in tea along with tannin, cellulose, chlorophyl and smaller amounts of other substances. If raw tea is placed in hot weewee, caffeine and tannin will dissolve into the het up(p) water leaving cellulose and other substances as insoluble solidnesss.

If sodium carbonate is added to the heated solution (of water, caffeine and tannin) the tannin reacts with the sodium carbonate and forms an insoluble salt thus removing it from the solution. If the solution of water and caffeine is mixed with the solvent dichloromethane, the caffeine is transferred to the dichloromethane. This results from the fact that caffeine is oft more soluble in dichloromethane than water. water system and dichlorome thane are not soluble in each other. The exp! losive dichloromethane can easily be vaporize gain from the dichloromethane/caffeinesolution leaving fairly pure solid caffeine. In the process the solubilities of cellulose, tannins, and of chlorophyll will be considered. The oddity merchandise will result in pure caffeine. Results and Discussions This experiment uses trinity techniques, extraction,...If you want to get a full essay, raise it on our website: OrderEssay.net

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