Quantitative estimation of the caffeine content in some energy drinks on the Ghanaian market

Abstract

The consumption patterns of energy drinks in the Tema Municipality of the Greater-Accra region of Ghana were investigated via a cross sectional survey and the caffeine contents of these energy drinks were determined by iodimetry. The survey showed that more males than females consume energy drinks. Five types of energy drinks; Lucozade (LU), Rush (RU), Red Bull (RB), Five Star (FS) and Monster (MT) were revealed. MT was not available on the market at the time of the survey. RU was the most consumed whereas RB was the least consumed. LU had a higher consumption rate than FS. The energy drinks were normally taken for enhanced performance. The caffeine contents of the various brands of energy drinks were as follows: LU-0.192 mg/ml, RU-0.245 mg/ml, FS-0.139 mg/ml and RB-0.089 mg/ml. Most of the correspondents (148 out of 156) consumed one to three cans or bottles of energy drinks per day and this led to an intake of caffeine which was less than the recommended daily allowance of 400 mg. Some, however, ingested more than 400 mg and experienced some side effects.

Uv-spectroscopic and iodometric back titration analysis of total caffeine content of energy drinks available in markets in cross river state, south-south, nigeria

“…The results were recorded and the process repeated thrice for each sample of energy drink. The difference between the blank and each of the titration in a sample was used to determine the caffeine content found in each titration, and the mean and standard deviation for the values for each sample was calculated to give the caffeine levels (Michael et al, 2018). Caffeine extraction procedure for UV analysis 25 ml sample of the energy drink was drawn into a 25 cm 3 pipette and placed into a 125 ml separation funnel, followed by the addition of 1 cm 3 of 20% aqueous disodium carbonate (IV) (Na 2 CO 3 ) solution and 20 cm 3 analytical grade dichloromethane.…”