Natural Radioactivity and Heavy Metal s in Milk Consumed in Saudi Arabia and Population Dose Rate Estimates

作者：Al Zahrani J H^*

来源：Life Science Journal-Acta Zhengzhou University Overseas Edition, 2012, 9(2): 651-656.

• Natural Radioactivity
• Milk
• Heavy Metals
• Ingestion dose
• Hazard quotient

This paper represents an important part of the Saudi Food and Drug Authority plane to reach its aims regarding the safety and effectiveness of food for humans. The results of radioactivity analysis carried out for K-40, Th-232 and Ra-226 in powdered infant's milk used in Jeddah city. The main detected activity corresponding to K-40 was within the range reported in different parts of the world with average activity of 234.18 +/- 1.9BqKg(-1), while the average activities of Ra-226, Th-232 were 0.46 Bqkg(-1), and 0.35 Bqkg(-1), respectively, although the activity of some samples were below the detection limit. The total average effective dose due to annual intake of Ra-226, Th-232 and K-40 from the ingestion of the powdered milk for infants were estimated to be 410 mu Sv for infant <= 1Y and157 mu Sv for infants (1-2Y), which are lower than allowed value (1mSv). The heavy metals analyses were done by atomic absorption spectrophotometer. The geometric mean of Fe, Zn, Mn, Cu and Pb in the samples of powdered milk was found to be 3.033, 2.91, 0.031,0.182 and 0.034 mg/kg respectively, where as the daily intake was computed to be 0.186, 0.179, 0.002,0.001 and 0.002 mg/day, respectively. The results showed that the intake of heavy metals through the ingestion of milk did not exceed the limit of one as proposed by US-IPA. This study could be useful as a baseline data for radiation and heavy metals exposure to infant's milk and their impact on infant's health. [J. H. Al-Zahrani. Natural Radioactivity and Heavy Metal s in Milk Consumed in Saudi Arabia and Population Dose Rate Estimates. Life Sci J 2012; 9(2): 651-656]. (ISSN: 1097-8135). http://www.lifesciencesite.com. 98

• 出版日期2012