Determination of Caffeine Content in Brewed Caffeinated and Decaffeinated Coffee
Abstract
Consumer curiosity has sparked the investigation of the caffeine content found in locally brewed Blackbird Coffee. A procedure involving liquid-liquid extraction with dichloromethane was developed to determine the amount of caffeine in brewed caffeinated and decaffeinated Starbuck's Dark Sumatra coffee. Recent adaptations to the procedure include a sodium hydroxide wash of the extracted organic layer. This has resulted in a change from a dark brown to a light yellow color of the extracted caffeine, indicating fewer impurities exist. The caffeine amounts recovered were reproducible, thus the method was proven to be reliable and used to determine the caffeine content of BlackBird coffee.
Session Name:
Chemistry: Water Quality and Sol-Gel Monoliths and Matrices
Start Date
10-4-2015 2:30 PM
End Date
10-4-2015 3:30 PM
Location
HSB 207
Determination of Caffeine Content in Brewed Caffeinated and Decaffeinated Coffee
HSB 207
Consumer curiosity has sparked the investigation of the caffeine content found in locally brewed Blackbird Coffee. A procedure involving liquid-liquid extraction with dichloromethane was developed to determine the amount of caffeine in brewed caffeinated and decaffeinated Starbuck's Dark Sumatra coffee. Recent adaptations to the procedure include a sodium hydroxide wash of the extracted organic layer. This has resulted in a change from a dark brown to a light yellow color of the extracted caffeine, indicating fewer impurities exist. The caffeine amounts recovered were reproducible, thus the method was proven to be reliable and used to determine the caffeine content of BlackBird coffee.