Regional dependence of urinary uranium baseline levels in non-exposed subjects with particular reference to volunteers from Northern Italy |
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Authors: | Bagatti D Cantone M C Giussani A Veronese I Roth P Werner E Höllriegl V |
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Institution: | Dipartimento di Fisica, Università degli Studi di Milano, Sezione di Fisica Medica, via Celoria 16 I-20133 Milano, Italy. |
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Abstract: | Knowledge of the level of natural uranium (U) in the human body is fundamental in order to estimate the potentially hazardous incorporation in accidentally exposed subjects. A constant monitoring of exposed workers needs reliable reference baseline values, which can be determined by measuring the U concentration in urine. ICPMS has proven to be a fast, reliable and highly sensitive technique for this purpose. Non-uniformity in the distribution of U levels in various regions and differences in dietary habits account for the significant regional variations of U concentration in urine in non-exposed subjects. In this paper, the determination of daily uranium urinary excretion levels in a group of 12 non-exposed subjects from Northern Italy is presented and compared to data present in the published literature and to values obtained in a larger group of German volunteers. The urinary U output values observed in the Italian subset are generally higher than the corresponding levels measured in other groups. This could be the result of a higher intake of U from liquids, as assessed by the determination of U concentration in drinking waters. |
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