Received: May 12, 2018;   Published: May 23, 2018

DOI: 10.32474/ANOAJ.2018.01.000109

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Abstract

This investigation was carried out to determine the pH, levels of caffeine contents in five soft drinks and four energy drinks available in local market of Pakistan. pH were measured by pH meter. Quantitative estimation of caffeine was performed by a simple and fast standard UV spectrophotometric method (Perkin Elmer lambda 35 UV/Vis spectrometer) using carbon tetrachloride as the extracting solvent at 270nm wave length. The minimum caffeine level of soft drinks was observed in Brand-3 (10.69 mg/serving), while Brand-5 showed the highest caffeine content (42.17mg/serving) showing a range from 10.6 to 42.17mg/serving. The levels of caffeine in all energy drink samples are well below the maximum allowable limits set by the food regulatory bodies, except E2. The E2 has greater calculated concentration then the labeled concentration .The minimum caffeine level of energy drinks was observed in E4 (32.04mg/L) while E2 showed highest caffeine level in energy drinks (101.705mg/serving) showing range from 32.04mg/ serving to 101.705mg /serving . And the pH ranges of these soft drinks were (2.29 to 3.02) and in energy drinks (2.85 to 3.28) .Further investigations are needed to determine the suitability of these soft and energy drinks.

Keywords: Caffeine; Cocoa Beans; UV Spectrophotometer; Comparison of Soft And Energy Drinks; White Crystalline Xanthine Alkaloid; Anthropologists; Warding off Drowsiness; Restoring Alertness ; Psychoactive Substance; Decaffeinated Coffee

Abstract| Introduction| Material and Method| Results and Discussion| Conclusion| References|