Source: www.sciencedaily.com/releases/2006/10/061012185602.htm


is there caffeine in decaf coffee


Decaffeination - Wikipedia, the free encyclopedia

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** Decaffeination **

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"Decaf" redirects here. For the computer software program, see DECAF.

*Decaffeination* is the act of removing caffeine from coffee beans, cocoa,
tea leaves and other caffeine-containing materials. (While caffeine-free
soft drinks are occasionally referred to as "decaffeinated", some are
better termed "uncaffeinated": prepared without adding caffeine during
production.) Despite removal of most caffeine, many decaffeinated drinks
still have around 1–2% of the original caffeine remaining in them, and
research has found that certain decaffeinated coffee drinks can contain
around 20% of the original caffeine.^[1]

In the case of coffee, various methods can be used. The process is usually
performed on unroasted (green) beans, and starts with steaming of the
beans. They are then rinsed with a solvent that extracts the caffeine while
leaving the other essential chemicals in the coffee beans. The process is
repeated anywhere from 8 to 12 times until it meets either the
international standard of having removed 97% of the caffeine in the beans
or the EU standard of having the beans 99.9% caffeine-free by mass. Coffee
contains over 400 chemicals important to the taste and aroma of the final
drink: It is, therefore, challenging to remove only caffeine while leaving
the other chemicals at their original concentrations.^[2]

/Coffea arabica/ normally contains about half the caffeine of /Coffea
robusta/. A /Coffea arabica/ bean containing little caffeine was discovered
in Ethiopia in 2004.^[2]

*Contents*

· 1 Roselius process
· 2 Swiss Water process
· 3 Direct method
· 4 Indirect method
· 5 CO[2] process
· 6 Triglyceride process
· 7 Decaffeinated tea
· 8 Caffeine content of decaffeinated coffee
· 9 Health effects of decaffeinated coffee
· 10 Decaffito
· 11 See


Source: en.wikipedia.org/wiki/Decaffeination

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