Determination of Caffeine and Sodium Benzoate in Both Imported and Locally Manufactured Energy Drinks Using HPLC and Spectrophotometer

Abstract

Three groups of energy drinks have been examined for sodium benzoate and caffeine using HPLC and spectrophotometer methods. Those brands include original UK brand which coded (RE), another two brands of (RL and B) which are imported from Austria to local companies, and the rest produced locally which are coded (T, FB, S and FE). The results showed that all brands contain sodium benzoate at different concentrations. FB brand comes out on top by containing around 416mg/l which was far above the permitted level by FAO/WHO, on the other hand the RE brand contained the lowest amount of sodium benzoate when analysed using HPLC. Results of caffeine examination showed that all samples contained lower levels of caffeine as it is claimed in their label to contain 300mg/l, in contrary to sodium benzoate the lowest concentration of caffeine found in the FB brand which was 13.78mg/l and the highest level of caffeine was found in FE brand which was 208.95mg/l. From the obtained results it is clear that none of the energy drink brands declared the actual content of both caffeine and sodium benzoate which usually required by food legislation and law. Therefore, it is considered as mislabelling which is recommended that the health authorities in our country to subject the local producers and the importers to present the required information on the labels without misleading consumers. It is also recommended to educate the population and put restriction on the local shops and supermarkets not to sell energy drinks to individuals under 16 years old.