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I have read conflicting things about the volatility and solubility of caffeine, and at what point during the tea brewing process caffeine is released.

When tea is used for multiple infusions, such as in Gongfu style brewing, do the different infusions have different amounts of caffeine?

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yes the amounts are different - but the curve is alwys specific to the time, temperature and amount of water you use for each infusion. I have to look through old chat transcripts for numbers before posting a full answer. –  rumtscho Feb 12 at 19:48
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2 Answers 2

Here's an interesting light article that gives some data points that would let you construct your own curve for caffeine extraction per time (for green tea only):

http://www.tching.com/2009/10/thirty-second-decaffeination-method-or-myth/

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Yes, they would all have different amounts of caffeine. It all depends on the kind of tea, the water temperature, how long the tea is brewing and how much water you use. If you want to make a reasonable comparison, you need to know the caffeine content as a percentage of the dry product's mass.

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