Abstract:
Chocolates and candies are among sweet food items consumed primarily by small children. In present study, four toxic metals, cadmium (Cd), nickel (Ni), chromium (Cr) and lead (Pb) were determined in different brands of chocolate and candy samples available in local markets of Bahir Dar city, Ethiopia. Three chocolate and three candy brands were randomly selected. The Concentrations of understudy toxic metals were determined by ICP-OES following the conventional wet-acid digestion on an electric hot plate. The concentrations of Cd, Ni, Cr and Pb were analyzed in different brands of chocolate and candy samples. The concentration of Ni ranged from 0.95 ± 0.022 mg/Kg to 3.56 ± 0.055 mg/Kg for chocolate samples was the highest among all other toxic metals determined. Pb was absent in two brands of chocolate and one brand of candy. Cd was ranged from 0.067 ± 0.001 mg/Kg to 0.1 ± 0.002 mg/Kg in chocolates and from ND to 0.15 ± 0.0005 mg/Kg in candy samples. Excel computer system, one-way analysis of variance (ANOVA) and origin software were used for data analysis. Except for Cr in candy samples, the ANOVA result showed that there is no significance difference in the mean concentration of toxic metals(P>0.05). The results were compared with the provisional maximum tolerable daily intake (PMTDI) which is set by JECFA. Except Cd, the rest toxic metals were above the limit. Hence, Clear information should be set about toxic metals in chocolates and candies.
Keywords: Toxic metals, Chocolates, Candies, ICP-OES, wet-acid digestion