Uranium Concentration in Typical Pakistani Diet
Open Access
- 1 January 2003
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Radiation Research
- Vol. 44 (3), 289-293
- https://doi.org/10.1269/jrr.44.289
Abstract
To strengthen the radiation protection infrastructure in Pakistan, the uranium concentration in daily diet was measured and its associated radiation risks were estimated for the adult population. Food samples were collected from major cities and districts of the country by the market basket method, from which daily diets were prepared. These diet samples were analyzed using inductively coupled plasma mass spectrometry (ICP-MS) at the National Institute of Radiological Sciences, Japan, the regional Central Reference Laboratory of the Reference Asian Man Project. The measured values of the uranium content were found to vary from 2.3 ng (g dry)-1 to 11 ng (g dry)-1. The geometric mean concentration and geometric standard deviation were 4.5 ×/÷1.7 ng (g dry)-1. This leads to a daily dietary intake of 2.6 ×/÷ 1.7 μg d-1 or 33 ×/÷ 1.7 mBq d-1, which is approximately 40% higher than the ICRP value. The measured value, i.e. 33 mBq d-1, contributes 12 Bq y-1 to annual intake of 238U activity and 0.54 μSv to the committed effective dose to the adult population. This is a very small fraction of the ICRP annual effective dose limit of 1 mSv for the general public. Therefore, it would pose no significant health hazard.Keywords
This publication has 6 references indexed in Scilit:
- Contributions of 18 Food Categories to Intakes of 232Th and 238U in JapanHealth Physics, 2000
- Studies on Intake and Body Fluid Concentrations of Thorium for Subjects Working and Living in Thorium Rich EnvironmentJournal of Radioanalytical and Nuclear Chemistry, 2000
- Daily Intakes of 134Cs 137Cs 40K 232Th and 238U in Ukrainian Adult MalesHealth Physics, 1997
- The dietary intake of238U,234U,230Th,232Th,228Th and226Ra from food and drinking water by inhabitants of the Walbrzych regionJournal of Radioanalytical and Nuclear Chemistry, 1997
- Age-dependent dose to members of the public from intake of radionuclides: Part 5 compilation of ingestion and inhalation dose coefficientsAnnals of the ICRP, 1996
- The Daily Intake of 234,235,238U, 228,230,232Th and 226,228Ra by New York City ResidentsHealth Physics, 1987