Determination of Concentrations of Selected Heavy metals in Cow’s Milk: Dodoma Urban District, Tanzania
Journal Title: International Journal of engineering Research and Applications - Year 2017, Vol 7, Issue 4
Abstract
Fresh cow’s milk samples were collected from five villages Chihanga, Msalato, Mtumba, Ntyuka and Chigongwe of Dodoma district, Tanzania, and preserved in a deep freezer (-20oC). The milk samples were digested by hot plate using 65% HNO3 and 30% H2O2.The concentrations of Mn, Co, Ni, Cu and Zn were determined by Flame Atomic Absorption Spectrometer. The elements Mn and Ni were not detected in all the milk samples under the study. The concentrations of Co, Cu and Zn were 0.079–0.147, 0.203–0.251 and 10.132–18.419 ppm, respectively in the milk samples of five villages under study. There is significant difference in the mean concentrations of Co and Zn between the milk samples of five villages at P = 0.05. But there is no significant difference in the concentration of Cu among the milk samples of five villages at P = 0.05.The results obtained for detected elements in the present study were also compared with international daily intake guidelines of different international organizations for food and were found below the levels allowed for Cu and Zn, whereas it is more for Co.
Authors and Affiliations
Vegi Maheswara Rao, H. C. Ananda Murthy
Keywords
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