isolation of caffeine lab

isolation of caffeine lab - CHEM212: Organic Chemistry 1...

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CHEM212: Organic Chemistry 1 ISOLATION OF CAFFEINE Experiment #2 Introduction: The aim of this experiment was to isolate an alkaloid, caffeine, from tea leaves using the laboratory techniques of refluxing, filtration, rotary evaporation, and recrystallization. Discussion: In this experiment we started with a sample of black tea leaves, and were instructed to use several different techniques in order to obtain pure caffeine. Although the focus was more on quality than quantity, that is to say it was more important to obtain
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pure caffeine in a smaller amount, than a lot of impure caffeine, there are still improvements that could be made to increase both yield and purity. While using the separatory funnel, not all of the chloroform and caffeine were filtered out. It was decided that to ensure only the caffeine and chloroform were filtered, and none of the other impurities, approximately one centimeter of desired solution was left in the funnel. Although this reduced impurity levels, this may have significantly decreased the yield of
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isolation of caffeine lab - CHEM212: Organic Chemistry 1...

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