Caffeine Content of Decaffeinated Coffee

Sample #	Store	Type/Brand	Caffeine Dose (mg/16 USA fl. oz)	Caffeine Dose (mg/100 ml)
D1	The Big Bean	Brewed, blended	10.1	2.135
D2	The Big Bean	Brewed, Italian Roast, Country Origin Colombia	10.6	2.24
D3	Starbucks	Brewed	8.6	1.82
D4	Royal Farms	Brewed	8.6	1.82
D5	Dunkin' Donuts	Brewed	10.1	2.135
D6	Hampden Café	Brewed, Antigua, Guatemala	10.6	2.24
D13	Krispy Kreme	Brewed	13.9	2.938
D14	Krystal	Folgers Instant	None detected	None detected
D15	Gainsville Doughnuts	Brewed	10.1	2.135
D16	McDonalds	Brewed	11.5	2.43

Caffeine content in "normal" coffe

Sample	Preparation Method	Caffeine Content (mg/100 ml)	Percentage (Rounded) of Caffeine Extracted from Ground Coffee	Caffeine Content per Serving (Average Serving Size) in mg
KG01	Cold brew, 8 hours	95.2	7	238.00 (250 ml)
KG02	Cold brew, 24 hours	112	8	280.00 (250 ml)
KG03	Cold drip with ice	72.9	5	182.25 (250 ml)
KG04	Cold drip without ice	98.6	7	246.50 (250 ml)
KG05	AeroPress	136	10	204.00 (150 ml)
KG06	Chemex	68.6	5	171.50 (250 ml)
KG07	French press	89.1	7	222.75 (250 ml)
KG08	American press	58.3	4	145.75 (250 ml)
KG09	Pour-over drip	74	6	185.00 (250 ml)
KG10	Espresso	273	21	68.25 (25 ml)
KG11	Ristretto	421	31	63.15 (15 ml)
KG12	Stove-top espresso maker	164	12	49.2 (30 ml, Angabe Bialetti)
KG13	“Espresso” from super-automatic espresso machine	224	17	67.2 (30 ml)
KG14	“Drip” coffee from super-automatic espresso machine	57.9	4	115.8 (200 ml)
KG15	Drip coffee machine	67.9	5	169.75 (250 ml)
KG16	Whole-roasted coffee beans, not brewed	1319	–	–