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| Tea (rec.drink.tea) Discussion relating to tea, the world's second most consumed beverage (after water), made by infusing or boiling the leaves of the tea plant (C. sinensis or close relatives) in water. |
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10-09-2004, 08:36 PM
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Yes, but these numbers can be different in "tea environment" I am pretty
sure that other extracts of tea will play a role in total picture. But may be not that big of a role. Anyway with these things so many small variables can play major role... Like pH, for instance. I bet your numbers are for pH 7.0 That is why I would love to have an access to a liquid chromatograph...  Sasha. "Robert Klute" wrote in message ... The solubility of caffeine in water is 2.2 mg/mL at 25 degC, 180 mg/mL at 80 degC, and 670 mg/mL at 100 degC. So, the temperature and length of brew will affect which chemicals are extracte and the concentration. 
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10-09-2004, 08:36 PM
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Yes, but these numbers can be different in "tea environment" I am pretty
sure that other extracts of tea will play a role in total picture. But may be not that big of a role. Anyway with these things so many small variables can play major role... Like pH, for instance. I bet your numbers are for pH 7.0 That is why I would love to have an access to a liquid chromatograph... Sasha. "Robert Klute" wrote in message ... The solubility of caffeine in water is 2.2 mg/mL at 25 degC, 180 mg/mL at 80 degC, and 670 mg/mL at 100 degC. So, the temperature and length of brew will affect which chemicals are extracte and the concentration.
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