TECHNICAL NOTE: Caffeine Content of Energy Drinks, Carbonated Sodas, and Other Beverages
Authors: McCusker, Rachel R.1; Goldberger, Bruce A.2; Cone, Edward J.3
Source: Journal of Analytical Toxicology, Volume 30, Number 2, March 2006 , pp. 112-114(3)
Publisher: Preston Publications
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Abstract:
The caffeine content of 10 energy drinks, 19 carbonated sodas, and 7 other beverages was determined. In addition, the variability of the caffeine content of Coca-Cola® fountain soda was evaluated. Caffeine was isolated from the samples by liquid–liquid extraction and analyzed by gas chromatography with nitrogen-phosphorus detection. The caffeine concentration of the caffeinated energy drinks ranged from none detected to 141.1 mg/serving. The caffeine content of the carbonated sodas ranged from none detected to 48.2 mg/serving, and the content of the other beverages ranged from < 2.7 to 105.7 mg/serving. The intra-assay mean, standard deviation, and % coefficient of variation for the Coca-Cola fountain samples were 44.5, 2.95, and 6.64 mg/serving, respectively.Document Type: Research article
Affiliations: 1: Department of Pathology, Immunology, and Laboratory Medicine, University of Florida College of Medicine, P.O. Box 100275, Gainesville, Florida 32610-0275 2: Department of Pathology, Immunology, Laboratory Medicine, and Department of Psychiatry, University of Florida College of Medicine, P.O. Box 100275, Gainesville, Florida 32610-0275 3: ConeChem Research, LLC, 441 Fairtree Drive, Severna Park, Maryland 21146
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