Determination of Physicochemical Properties, Heavy Metals and Pesticide Residues of Honey Samples Collected from Walmara, Ethiopia
International Journal of Advanced Research in Chemical Science (IJARCS) Volume 6, Issue 7, 2019, PP 23-33 ISSN No. (Online) 2349-0403 DOI: http://dx.doi.org/10.20431/2349-0403.0607004 www.arcjournals.org Determination of Physicochemical Properties, Heavy Metals and Pesticide Residues of Honey Samples Collected From Walmara, Ethiopia Deressa Kebebe1*, Alemayehu Paulos2, Ermias Haile3 Department of Chemistry, Hawassa University, Hawassa, Ethiopia *Corresponding Author: Deressa Kebebe, Department of Chemistry, Hawassa University, Hawassa, Ethiopia Abstract: This study was conducted to investigate pesticide residues, heavy metals and physicochemical parameters levels in honey samples. In this study, the results of moisture content, electrical conductivity, pH and ash were 15.15 –21.75%, 0.45–1.55 mScm-1, 3.50–4.50, and 0.18–0.80% and that of Fe, Zn, Cu, Pb, Cd, Ni and Cr were analyzed by using flame atomic absorption spectrophotometer and the concentrations ranged from 4.87-11.79 µg/g, 1.41-6.94 µg/g, 0.22-1.22 µg/g, 0.37-0.90 µg/g, 0.04-0.70 µg/g, 0.26-0.60 µg/g and 0.16-0.50µg/g with mean concentration ranges, respectively. All metals were determined by using atomic absorption spectrophotometer except Fe that was determined by using UV-visible spectrophotometer. The percentage recovery for metal analyses was from 85% to 104%. Cd, Cu, Cr and Pb concentrations in honey samples from all sites were not significantly different but Fe, Zn and Ni levels were significantly different at (p<0.05). Pesticide residues in the honey samples were determined by using gas chromatography coupled with mass spectrometer technique.
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