Extraction of caffeine from tea leaves

Extraction of caffeine from tea leaves

Leave the test tube in the warm water bath. Caffeine dissolves in the solvent, while most of the other compounds in the leaves do not. Melting point of Caffeine and Standard T1 T2 T1-T2 Caffeine -3 Standard -8 Based on the result caffeine is more pure than the standard because the range of its melting point is less compared to the standard. Figure 3. This compound is better known for its antioxidant properties, with the potential to initiate apoptosis in cells [7] and promote cancer cell death [8]. Then the ice cube was mixed in the teas extract cooling to room temperature. An end of a capillary tube was sealed by heating it, while rotating at 45? Results and Discussion In order to extract the caffeine from the tea leaves the solid-liquid extraction and liquid-liquid extraction were done first.

In this process, the product will undergo a direct phase change from solid to vapor without passing the liquid state. Leave the test tube in the warm water bath. The cold finger was constantly filled with ice water.

why is caffeine more soluble in dichloromethane than in water

Stereochemical drawing of CH2Cl2. The aqueous layer was discarded and the CH2Cl2 was put in an evaporating dish, the top was covered with aluminum foil which has some perforations, and it was kept in the locker to let it dry.

Extraction of caffeine from tea ppt

Table 3. Caffeine dissolves in the solvent, while most of the other compounds in the leaves do not. Teabags were then boiled in ml water for 5 minutes. Actual extraction set up with labeled parts. In this part we are able to tell the purity of the caffeine through the range of the melting point. Lewis Structures of purine and caffeine. An end of a capillary tube was sealed by heating it, while rotating at 45? The alkaline solution, when added to the CH 2Cl2 layer, will react with the gallic acid to form water, carbon dioxide, and a gallic acid salt Figure 3. To do this, dampen the filter paper with dichloromethane, add a Celite pad about 3 grams Celite.

Densities of liquids are at work in the extraction setup, with CH 2Cl2s 1. Turn on the vacuum and slowly pour the solution over the Celite. In the extraction setup, both caffeine and gallic acid are present in the lower layer Figure 2.

Lewis Structures of purine and caffeine.

extraction of caffeine from tea lab report conclusion

Filter the liquid through a thin layer of cotton into a small test tube. The addition of the sodium ion increases the polarity of gallic acid, increasing its solubility in water.

extraction of caffeine from tea project
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How to Extract Caffeine From Tea