Quantitative Bacterial Examination and Chemical Evaluation of Diet, Club, and Ice-cream Sodas, Soft Drinks PDF

Keywords

club soda, diet soda, ice-cream soda, microbial contamination, trace metals.

Abstract

Diet, club, and ice-cream sodas are flavoured soft drinks consumed throughout the world, especially in summer seasons. This study has been undertaken to monitor the bacterial and chemical contamination of these national and international branded drinks procured from local markets. The isolated coliforms and microbes were E. coli, Salmonella spp, Klebsiella spp. Enterobacter spp, Shigella spp and Bacillus cereus. Diet and club sodas were less contaminated with microorganisms than were ice-cream sodas Fifteen trace and toxic elements were identified with an atomic absorption spectrophotometer following the improved ash digestion method. The values of Nickel (Ni), (0.15 mg/L), (Pb (0.28 mg/L), Cadmium (Cd) (0.13 mg/L) and (AI (0.76 mg/L), were higher than the (WHO) recommended limits. The concentrations of (Na, Fe, Pb) and Chromium (Cr) were higher in club sodas than diet and ice-cream sodas and the concentrations of Calcium (Ca). Magnesium (Mg), Potassium (K), Iron (Fe), Zinc (Zn), Aluminum (Al), Barium (Ba). (Co), Cobalt, and Manganese (Mn) in ice-cream sodas were also higher than diet and club sodas. Overall, the ice-cream sodas did not conform to the (WHO) standards allowed for safe ingestion of micro and macro-metals in various drinks.