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Research Article

Evaluation of Lead and Cadmium Heavy Metal Residues in Milk and Milk Products Sold in Ogbomoso, Southwestern Nigeria

G.O. Tona, V.O. Adetunji, S.A. Ameen and A.O. Ibikunle
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The concentrations of lead (Pb) and cadmium (Cd) heavy metals in cow milk, goat milk butterfat, soft cheese and yoghurt samples were evaluated. Forty samples (eight of each sample) were analyzed using the atomic absorption spectrophotometer. There were detectable residual concentrations of Pb and Cd in all the 40 samples. The range of 0.0025 to 0.0061 ppm of Pb concentrations in the samples was within the Maximum Residue Limit (MRL) of 0.0125 to 0.0175 ppm of Pb in milk and dairy products. There was a significantly (P<0.05) higher mean Pb concentration of 0.0061±0.0025 ppm in the soft cheese samples. The residual concentrations of Pb in the cow milk samples were not significantly (P>0.05) different from that of the goat milk samples. Residual concentrations of Cd were higher in soft cheese samples (0.0048±0.0007 ppm) and in goat milk samples (0.0045±0.0005 ppm Cd) and these two concentrations exceeded the MRL of 0.0035 ppm of Cd recommended by India regulations. The residual concentration of Cd in goat milk samples (0.0045±0.0005 ppm) was significantly (P<0.05) higher than in the cow milk samples (0.0021±0.0007 ppm). The results of this study showed that all the milk and milk products samples analyzed contained residues of Pb and Cd heavy metals. The observation of residual Cd concentrations above the MRLs in the soft cheese samples and in the goat milk samples is of public health concern and could cause health hazards to consumers.

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  How to cite this article:

G.O. Tona, V.O. Adetunji, S.A. Ameen and A.O. Ibikunle, 2013. Evaluation of Lead and Cadmium Heavy Metal Residues in Milk and Milk Products Sold in Ogbomoso, Southwestern Nigeria. Pakistan Journal of Nutrition, 12: 168-171.

DOI: 10.3923/pjn.2013.168.171


1:  Anastasio, A., R. Caggiano, M. Macchiato, C. Paolo, M. Ragosta, S. Paino and M.L. Cortesi, 2006. Heavy metal concentrations in dairy products from sheep milk collected in two regions of Southern Italy. Acta Vet. Scand., 47: 69-74.
CrossRef  |  Direct Link  |  

2:  Aslam, B., I. Javed, F.H. Khan and Zia-ur-Rahman, 2011. Uptake of heavy metal residues from sewerage sludge in the milk of goat and cattle during summer season. Pak. Vet. J., 31: 75-77.
Direct Link  |  

3:  AOAC., 2005. Official Methods of Analysis. Association of Official Analytical Chemists, Washington, DC., USA.

4:  Belewu, M.A., 2006. A Functional Approach to Dairy Science and Technology. 1st Edn., Adlek Publisher, Ilorin, Nigeria, pp: 137-172.

5:  Church, D.C., G.E. Smith, J.P. Fontenot and A.T. Ralston, 1974. Digestive Physiology and Nutrition of Ruminants. 3rd Edn., Vol. 2, Nutrition, Albany Printing Co., USA., pp: 413-521.

6:  Correia, P.R.M., E. Oliveira and P.V. Oliveira, 2000. Simultaneous determination of Cd and Pb in foodstuffs by electrothermal atomic absorption spectrometry. Analytica Chimica Acta, 405: 205-211.
Direct Link  |  

7:  Chitmanat, C. and S. Traichaiyaporn, 2010. Spatial and temporal variations of physical-chemical water quality and some heavy metals in water, sediments and fish of the mae Kuang River, Northern Thailand. Int. J. Agric. Biol., 12: 816-820.
Direct Link  |  

8:  Gambelli, L., P. Belloni, G. Ingrao, L. Pizzoferrato and G.P. Santaroni, 1999. Minerals and trace elements in some Italian dairy products. J. Food Comp. Anal., 12: 27-35.
CrossRef  |  Direct Link  |  

9:  Ogungbesan, A.M., O.O. Eniolorunda, O.A. Jinadu, A. Makanji, A.A. Lamidi and E. Mbomie, 2010. Effect of combined levels of Panicum maximum (Jacq) and Gliricidia sepium (Jacq) wale on the antiquality factors, digestibility in West African Dwarf does fed cassava offal basal diets. Proceedings of the 35th Conference of Nigerian Society for Animal Production, March 14- 17, 2010, University of Ibadan, Nigeria, pp: 625-627.

10:  Santhi, D., V.B. Balakrishnan, A. Kalaikannan and K.T. Radhakrishnan, 2008. Presence of heavy metals in pork products in Chennai (India). Am. J. Food Technol., 3: 192-199.
CrossRef  |  Direct Link  |  

11:  Somers, E., 1974. The toxic potential of trace metals in foods: A review. J. Food Sci., 39: 215-217.
CrossRef  |  Direct Link  |  

12:  Tona, G.O., K. Agyemang, J.A. Adeneye and A.A. Busari, 2000. The composition of some major minerals in the milk of Bunaji cows fed increasing levels of dietary total digestible nutrients during early lactation. Proceedings of the 5th Annual Conference of the Animal Science Association of Nigeria, September 19-22, 2000, Port-Harcourt, pp: 149-152.

13:  Tripathi, R.M., R. Raghunath, V.N. Sastry and T.M. Krishnamoorthy, 1999. Daily intake of heavy metals by infants through milk and milk products. Sci. Total Environ., 227: 229-235.
CrossRef  |  

14:  Venugopal, B. and T.D. Luckey, 1978. Metal Toxicity to Mammals, Chemical Toxicity of Metals and Metalloids. 1st Edn., Plenum Press, New York.

15:  Ward, N.I. and J.M. Savage, 1994. Metal dispersion and transportational activities using food crops as biomonitors. Sci. Total Environ., 146: 309-319.
PubMed  |  Direct Link  |  

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