Journal Article

Caffeine Content of Energy Drinks, Carbonated Sodas, and Other Beverages

Rachel R. McCusker, Bruce A. Goldberger and Edward J. Cone

in Journal of Analytical Toxicology

Volume 30, issue 2, pages 112-114
Published in print March 2006 | ISSN: 0146-4760
Published online March 2006 | e-ISSN: 1945-2403 | DOI:
Caffeine Content of Energy Drinks, Carbonated Sodas, and Other Beverages

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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.

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Subjects: Medical Toxicology ; Toxicology (Non-medical)

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