A survey of lead contamination in raw cow's milk by atomic absorption spectrophotometry from different region of Tabriz

Toxicities by heavy metals especially by lead are a public health problem. The aim of this study by random sampling (n= 400, 100 samples of each geographical path) was conducted on the north, south, east, and west industrial and traditional cattle-farms of Tabriz. The samples were freeze and then the lead amount of the samples was measured using flame atomic absorption method. The mean rate of lead in milk of the west, south, north, and east of Tabriz cattle-farms was reported as 0.531, 0.641, 0.686, and 0.656 ppm. A meaningful statistical difference was observed among the lead-mean of the different regions of Tabriz (P 0.05) was observed among the mean-rates of milk lead as well as daily milk production of the cattle in different understudied regions.