Tag : isolation of caffeine

Isolation of Caffeine from Tea Leaves

Isolation of Caffeine from Tea Leaves By: Julia Trimble Introduction: Caffeine is an alkaloid stimulant with a cyclic backbone structure analogous to the purine structures of DNA, giving it the ability to affect biochemical pathways in the body1.  In commercial application, caffeine supplements pharmaceuticals and certain beverages such as coffee or tea.  Standard tea bags contain 2.00 +/- 0.05 g of tea leaves along with approximately 55 mg of caffeine[1].  Using the proper extraction methods, the caffeine within a tea […]

Characterization and Isolation of Caffeine: Lab Analysis

Written by Jennifer Purpose The experiment was carried out to extract caffeine from tea leaves (Isolation of Caffeine). The experimental procedure was carried out in four weeks. In the first week, two tea bags were used together with anhydrous sodium carbonate to make a solution with water. The tea solution was allowed to cool. In the second week, dichloromethane was added to the solution in three portions in a separatory funnel which formed two layers and the aqueous caffeine layer […]