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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 112-114 |
| Number of pages | 3 |
| Journal | Journal of analytical toxicology |
| Volume | 30 |
| Issue number | 2 |
| DOIs | |
| State | Published - Mar 2006 |
| Externally published | Yes |
ASJC Scopus subject areas
- Analytical Chemistry
- Environmental Chemistry
- Toxicology
- Health, Toxicology and Mutagenesis
- Chemical Health and Safety