Home › Is it true that espresso has less caffeine than regular coffee?

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Thu, 2007-12-27 10:42 — Benjamin (not verified)

Lose Caffeine over time?

Well, I was looking for any conclusive evidence on the subject as my in-laws claim they can have coffee after 1 hour because all of the caffeine is gone...

This of course contradicts my Organic Chemistry training. Water's boiling point is 212 F, Caffeine's is about 313 F.... water evaporates first. The coffee never reaches 313 F, or the coffee would be boiling.

Since the water evaporates first, that only leaves more caffeine, meaning that it actually gets stronger over time.

However they insist it gets weaker so I wanted to verify. 1 year of O-Chem tells me it gets stronger over time, but I could be wrong which is why I'm looking.

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