Revista Europea de Biología Experimental Acceso abierto

Abstracto

Evaluation and determination of toxic metals (Lead and Cadmium)in cow milk collected from East Azerbaijan, Iran

Abolfazl. Asadi Dizaji, Ali. Eshaghi, Abolfazl. Aghajanzadeh Golshani, Kambiz. Nazeradl, Ali Asghar. Yari, Soheil. Hoda

Milk has been considered as one of the unique sources for children and even adults nutrition. In this study was 100 milk samples collect from different zonal east Azerbaijan Province: Tabriz, Sarab, Maragheh, Meyaneh, Azarshahr, Oskou, Malekan and Ahar. In accordance with the present survey and studies the amount and level of Pb and Cd has been specified in the cow milk. In order to measure the poisonous metals of milk, four digestion methods have been experienced. Organic matter is digested with nitric acid, hydrogen peroxide and perchloric acid; the most suitable acids in wet digestion of milk. The dosage Pb and Cd in milk was accomplished with the help Spectrometry of atomic absorption using a Varian AA220 atomic absorption spectrometer (Australia). The highest concentration of cadmium was found in the Sarab city (4.52±0.82 pbb) and the lowest ones in the Malekan city (0.57±0.15 pbb). The highest concentration of Lead was found in the Meyaneh city (182.08±20.25 pbb) and the lowest ones in the Ahar city (12.82±1.91 pbb). Statistical analyses showed that there are significant differences between lead and cadmium concentrations in raw cow's milk samples from different regions of East Azerbaijan province. In all the samples measured cadmium contents, was less than authorized limit by FAO/WHO standard (Cd: 10μg/kg). But only in 28% the samples measured Lead contents, was less than authorized limit by FAO/WHO standard (Pb: 20μg/kg). The consequences have shown us that Lead and Cadmium causes dangerous effects on human organs, and we should do our best to decrease the amount of the above-mentioned metals.