Correlation between Lead Concentration in Produced Milk and Drinking Water in a few Dairy Farms of Tehran Province

Subject Areas : clinical veterinary science

بهراد  Radmehr ¹ (Department of Food Hygiene, Faculty of Veterinary Medicine, Islamic Azad University, Karaj branch, Iran.)
مهرداد  Nematparvar ² (Graduated from Faculty of Veterinary Medicine, Islamic Azad University, Karaj branch, Iran)
مهران  Farhoodi Moghadam ³ (Department of Food Hygiene, Faculty of Veterinary Medicine, Islamic Azad University, Karaj branch, Iran)
مهرداد  Khoshnevis ⁴ (Graduated from Faculty of Veterinary Medicine, Islamic Azad University, Karaj branch, Iran.)

Received: 2016-11-02 Accepted : 2016-11-02 Published : 2009-12-22

Keywords: water, Milk, Lead, Poisoning,

Abstract :

Lead is a heavy metal and lead poisoning may occurre if it enters regularly into the animal or human body, So in this study lead concentration in milk and water were compared for a possible correlation. 100 samples of raw milk from 10 farms around city of Tehran were collected randomly. These samples were collected directly from cows in the farms. 10 sample of water were collected from the same farms. Lead concentration was measured in all of the samples by Atomic Absorption Spectrophotometery and according to the Association of Analytical Communities method. The results showed that mean lead concentration in milk was 264±204/19 ppb which it was more than standard permitted level of codex 2007 (20ppb). Lead concentration in all of the milk samples were over the standard permitted level but lead concentration in drinking water samples were under the codex 2007 permitted level (10ppb), except two samples which were over the standard. Statistical analysis of results showed that there was no correlation between lead in drinking water and in the cow’s milk. Therefore, water can not be the source of lead contamination in the milk.