Main Article Content
Quantitative Analysis of Caffeine in Cola Beverage by Extraction and Spectrophotometry
Caffeine in Cola beverage (Coke) was extracted by 1-propanol which is nontoxic and less expensive than chlorinated solvent, and then quantitatively analyzed using UV- spectrophotometry at λmax. The standard solution of 20 ppm caffeine in 1-propanol was scanned between 250-300 nm and λmax was detected at 274 nm. At this λmax, the standard curve of standard caffeine in 1-propanol in the range of 0-30 ppm was prepared and used to determine the amount of caffeine in Coke.We found that caffeine in Coke was 10.340±0.434 mg/100 mL.
Copyrights of all articles in the Journal of Food Technology available in print or online are owned by Siam University and protected by law.