McCusker Rachel R, Goldberger Bruce A, Cone Edward J
Department of Pathology, Immunology, and Laboratory Medicine, University of Florida College of Medicine, P.O. Box 100275, Gainesville, FL 32610-0275, USA.
J Anal Toxicol. 2006 Mar;30(2):112-4. doi: 10.1093/jat/30.2.112.
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.
测定了10种能量饮料、19种碳酸汽水和7种其他饮料中的咖啡因含量。此外，还评估了可口可乐喷泉汽水咖啡因含量的变异性。通过液-液萃取从样品中分离出咖啡因，并采用带氮磷检测的气相色谱法进行分析。含咖啡因能量饮料的咖啡因浓度范围为未检出至141.1毫克/份。碳酸汽水的咖啡因含量范围为未检出至48.2毫克/份，其他饮料的含量范围为<2.7至105.7毫克/份。可口可乐喷泉样品的批内均值、标准差和变异系数分别为44.5、2.95和6.64毫克/份。
