Measurement of Natural Radionuclides Levels and their Aannual Effective Doses in Different Types of Powdered Milk Consumed by Infants in Jordan

Ala’a A. Tawalbeh, Khaild M. Abumurad, Eyad S. M. Abu-Nameh, Ali M. Qaisi

Abstract


In this study, fourteen samples of different types of imported and locally produced powdered milk consumed by infants in Jordan were analyzed using gamma-ray spectrometry system equipped with a Hاigh Purity Germanium (HPGe) detector. The activity concentrations of the natural radionuclides 238U, 232Th and 40K present in the studied samples were measured. The measurements indicted that the radioactivity concentrations for: 238U ranged from 0.23±0.10 Bq.kg-1 to 2.03±0.74 Bq.kg-1 with an average of 1.1±0.3 Bq.kg-1, for 232Th ranged from 0.12±0.08 Bq.kg-1 to 0.68±0.29 Bq.kg-1 with an average of 0.42±0.13 Bq.kg-1 and for 40K ranged from below detection limit to 479±27.1 Bq.kg-1 with an average of 346±19.6 Bq.kg-1. The annual effective dose rate that infants may experience as a result of the consumption of powdered milk (the study samples) and the contents of the above-mentioned radioactive elements were approximately 268 μs per year. This total is way less than the permissible value of 1 mSvy-1 for public. The obtained results were compared with the international accepted values, and found to be within the acceptable limits. Therefore, according to the findings of this study, the investigated powdered milk samples does not pose any significant health hazard and is considered radiologically safe for infants consumption in Jordan.

Keywords


238U, 232Th and 40K, Naturally Occurring Radionuclides, Powdered Milk, Infants, Radioactivity Concentrations, Annual effective Dose (AED)

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