Heavy Metals Assessment in Some Selected Soft and Alcoholic Drinks in Iwo, Nigeria
This study is aimed at assessing & comparing the levels of some heavy metals in most commonly sold and/or consumed soft and alcoholic drinks in Iwo, Osun State, Nigeria. Three brands each of soft drink (Coke, 7Up & Maltina) and alcoholic drinks (Orijin, Trophy & Goldberg) were bought and analyzed for copper, chromium & lead using Flame Atomic Absorption Spectrophotometric technique. 30 mL of each of the sample was digested, after allowing the sample to stand for 24 hrs for gas evaporation, using dry ashing method; 10 mL of concentrated HNO3 was added to the ash, filtered and made up to 30 mL mark with 0.1 M HNO3. The digested samples were analyzed for Cu, Cr & Pb using Buck Scientific Model 210VGP Flame Atomic Absorption Spectrophotometer. Results showed that overall mean levels of Cu were 0.05 ± 0.03 mg/L and 0.09 ± 0.04 mg/L for soft & alcoholic drinks respectively. Chromium was below detection limit of the FAAS and can be inferred to be below tolerance limit set by NIS (0.05mg/L). Lead was detected in both sampled drinks at a concentration ranging from 0.010 - 0.140 mg/L for soft drinks and
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