Cadmium and lead content of milk and milk products
2002
Olkonen, A. | Henno, M. | Kuebarsepp, I. (Estonian Agricultural Univ., Tartu (Estonia). Inst. of Animal Science)
Concern about increasing pollution of global environment with cadmium and lead has created an increased interest, in the problem of contamination of foodstuffs. Milk and milk products play an important part in man's and especially children's diet; hencethere is an interest in studying of contamination by cadmium and lead. Cadmium and lead are cumulative poisons, which may be ingested with food or drink and by inhalation. The cow's udder is a very good biological filter and only a very small portion of the ingested Cd and Pb is secreted in milk. Up to now the content of heavy metals of Estonian milk and milk products has not been studied. Milk samples were collected from the same areas, where Kaerblane, Kevvai, Kanger (2000) investigated Cd and Pb content of Estonian soils and plants. By the content of Cd and Pb content of Estonian soils belong to the low and medium class. Several countries have set acceptable limits for milk and milk products. In Estonia the acceptable limits are: for milk Cd 0.03, Pb 0.02, for curd and curd products Cd 0.1, Pb 0.3 and for cheeses Cd 0.2, Pb 0.5 mg/kg. The mean content of Cd in Estonian milk was 0.0002, in cheeses 0.0011 and in butter 0.0004 mg/kg. The mean content of Pb in Estonian milk was 0.005, in cheeses 0.0103 and in butter 0.0216 mg/kg. All these levels were very low
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