DETERMINATION OF CAFFEINE IN SOFT AND ENERGY DRINK AVAILABLEIN MARKET BY USING U.V/VISIBLE SPECTROPHOTOMETER

ABSTRACT
This study was carried out to determine the PH and level of caffeine in eight brands of
carbonated soft and energy drinks available in local market in akure, Nigeria. Quantitative
analysis UV- spectrophotometric methods using carbon tetrachloride as the extracting
solvent. Result showed that the PH of the beverages were slightly acidic ranging from 5.52 to
6.44. the minimum caffeine level was observed in the carbonated soft drink coca cola
[43.71±0.55ppm], while the energy drink, red bull sample showed the highest caffeine
content [58.31±0.35ppm]. the carbonated soft drinks showed caffeine level in the range of
43.71 and 45.83ppm with average concentration of 44.52ppm, where as in the energy drinks
it ranged from (47.56 to 58.31) ppm with a mean concentration of 52.24ppm. The caffeine
contents in all the beverage samples analyzed in this study are well below the maximum
allowable limits set by the united states food and drugs administration [USFDA] and national
agency for food and drugs administration (NAFDAC).
Keywords: Beverage drinks, Caffeine, UV-spectrophotometer, carbon tetrachloride, USFDA
and NAFDAC.