water temp vs caffeine content

- K
- Kevin Graham
  
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posted
19 years ago

Tue, Sep 7, 2004 8:08 PM

I have read that most of the caffeine comes out in just under a minute. But does this occur only at boiling temp ? Anything happen at room temp ?

thanks, Kevin

- R
- Robert Klute
  
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posted
19 years ago

Tue, Sep 7, 2004 11:17 PM

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.

- A
- Alex Chaihorsky
  
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posted
19 years ago

Fri, Sep 10, 2004 7:36 PM

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.