Determination of Toxic Metals in Different Brand of Chocolates and Candies, Marketed in Pakistan

  • Nusrat Jalbani PCSIR Laboratories Karachi, Pakistan
  • Tasneem Gul Kazi National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan
  • Hassan I. Afridi National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan
  • Mohammad Bilal Arain Dept. of Mathematics & Basic Sciences, NED University of Engineering and Technology, Karachi 75270, Pakistan

Abstract

In present study three toxic metals, cadmium (Cd), nickel (Ni) and lead (Pb) were determined in chocolates and candy samples available in local markets of Hyderabad, Pakistan. Concentrations of understudy toxic metals (TMs) were determined by electrothermal atomic absorption spectrometry (ETAAS) prior to microwave assisted acid digestion. Validation of the methodology was performed by standard addition method and conventional acid digestion on electric hot plate to obtained TMs concentration, for comparative purpose to obtain results within the 95% confidence level. No significant differences were observed for TMs obtained from both methods (P = 0.05). The concentration of Cd, Ni and Pb were observed in chocolates and candy samples is ranged as of 0.099 - 0.353, 1.45 - 4.33 and 1.11 - 2.48 µg/g, respectively. The results indicated that cocoa-based chocolates have higher contents of TMs than milk- based chocolates and candies.

Published
Dec 1, 2009
How to Cite
JALBANI, Nusrat et al. Determination of Toxic Metals in Different Brand of Chocolates and Candies, Marketed in Pakistan. Pakistan Journal of Analytical & Environmental Chemistry, [S.l.], v. 10, n. 1 & 2, p. 5, dec. 2009. ISSN 2221-5255. Available at: <http://pjaec.pk/index.php/pjaec/article/view/20>. Date accessed: 23 nov. 2017.