topbanner.gif
Login
Username

Password




Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.
Shoutbox
You must login to post a message.

tahreem
Offline
· 09/25/2020 4:05 AM
https://smallespre
sso.com/blogs/news
/8-best-portable-e
spresso-maker-2020

tahreem
Offline
· 09/25/2020 4:00 AM
Portable Coffee Maker for car

Koffee Kosmo
OfflineAdmin
· 08/28/2020 7:15 PM
I have updated my signature and added links to the KKTO roaster build

snwcmpr
Offline
· 08/16/2020 8:12 AM
I will say, it only happened once, briefly, to me.

NetriX
OfflineAdmin
· 08/16/2020 7:57 AM
I was blocked too, our hosting provider is dropping the ball lately. thumbdown

Users Online
Guests Online: 2

Members Online: 0

Total Members: 6,743
Newest Member: tahreem
In Memory Of Ginny
Donations

Latest Donations
Anonymous - 5.00
Anonymous - 5.00
renatoa - 2.00
JitterzZ - 2.01
renatoa - 2.00

View Thread

Who is here? 1 guest(s)
 Print Thread
Caffeine Content in Coffee Beverages
Dan
There is a lot of talk, but not much fact, about caffeine content in coffee. One of the difficulties is that there is a huge variability on caffeine content in green beans in general. What we know is that altitude is not a factor.

A study presented at ASIC says the most significant factors for caffeine content for a given coffee lot is (in order of importance) grind, preparation method, degree of roast.

Their tests revealed that coffee roasted and ground to typical value for various preparation methods had these caffeine percent content when 70g of the same coffee (various roasts and grinds) in a liter of water:

Sack (medium roast, coarse grind) = 0.045 (and probably Drip)
Percolator (medium roast, coarse grind) = 0.065 (and probably Press)
Espresso (dark roast, fine grind) = 0.060

In all tests, 70g of the same Arabica coffee was used for each liter of water.

For all preparation methods, with an given combination of grind and roast, the percolator always extracted more caffeine and the espresso machine the least.

What this says, if my math is correct is that each gram of coffee will yield this much caffeine for the the same preparation methods, roasts, and grind:

Sack (Drip) = 6.43mg caffeine / gram coffee
Percolator (Press Pot) = 9.29mg caffeine / gram coffee
Espresso = 8.57mg caffeine / gram coffee

So, if you make a double-shot of espresso with 16g coffee, expect 137mg of caffeine.

If you use 35 grams to make a press pot of coffee and pour that into two, big mugs, they will have 163mg of caffeine in each.
Edited by Dan on 09/10/2007 6:03 PM
 
http://www.intactamerica.org
Jump to Forum:

Similar Threads

Thread Forum Replies Last Post
Portable Coffee Maker for car Member Photo's, Blogs, Websites and Pod Casts 2 09/25/2020 6:05 AM
TC4+ Arduino coffee roaster shield (TC4-compatible) Dataloggers/Controllers/Rate of Rise Meters 217 09/05/2020 4:10 AM
Bean blend for iced coffee BLENDING COFFFE 10 09/02/2020 7:18 AM
My coffee doesn't suck Snob Stories 7 08/31/2020 12:34 PM
New behmor coffee roaster??? Behmor 1600 11 08/14/2020 10:03 AM
Homeroasters Association Logo, and all Content, Images, and Icons © 2005-2016 Homeroasters Association - Logos are the property of their respective owners.
Powered by PHP-Fusion copyright © 2002 - 2020 by Nick Jones.
Released as free software without warranties under GNU Affero GPL v3.
Designed with by NetriX