Extraction Of Caffeine From Tea

Take 5 tea bags and record the weight of these tea bags.

Extraction of caffeine from tea. This gave calculated values of 59 1 recovery and 40 9 error. Data and results caffeine extraction worksheet tea extract description data 1 volume of extract ml amount of caffeine in extract mg ml hplc sample 1 2 total caffeine in 100 ml sample 3 tare weight of rb flask 4 final weight of flask dried caffeine 5 crude caffeine isolated mg 4 3 6 yield of crude caffeine 5 2 100. Another way to extract caffeine from tea is to brew tea in hot water allow it to cool to. In this method caffeine is extracted from tea.

Tannins soluble in water dichloromethane tannin salts soluble in water insoluble in dichloromethane background to the procedure tea leaves consist mostly of cellulose a water insoluble polymer of glucose which is a simple sugar a monosaccharide. A pure product of 065 g caffeine was obtained. Caffeine can be isolated from tea s with liquid liquid extraction and qua ntitated b y gas chro. To do so caffeine must be introduced to a solvent that is both volatile and insoluble to water.

Now place the 5 tea bags in this beaker. The mass of this solid would reflect the actual yield of caffeine in the tea. This will help you determine how well your procedure worked. The type of tea that is used isn t very important as long as it is caffeinated.

Allow the mixture to cool for 5 minutes and then decant the mixture into another beaker. The growing buds and young leaves of tea plants manufacture the highest amounts of caffeine. The caffeine can then be separated from the alkaline tea solution by a process of extraction using dichloromethane an organic solvent in which caffeine readily dissolves. The amount of caffeine reco.

Flavinoid pigments and chlorophylls also contribute to the color of a tea solution. Caffeine has a greater affinity for methylene chloride and will easily dissolve in this solvent over water. Using the proper extraction methods the caffeine within a tea bag could potentially be isolated to yield a pure solid. However caffeine is not the only organic substance.

A perfect example is methylene chloride. How to extract caffeine from tea caffeine from tea. Caffeine was extracted from tea by the use of solid liquid and liquid liquid extractions. Take 500 ml beaker add 200 ml of distilled water to it.

The calcium salts of the tannins remain dissolved in the aqueous solution. Boil the contents in the beaker vigorously using a hot plate.