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

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.

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.

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.