Determination of depleted uranium in the presence of natural uranium in environmental soil samples by ICP-MS after sequential extraction

摘要

Determination of depleted uranium (DU) in the presence of natural uranium (NU) by inductively coupled plasma mass spectrometry (ICP-MS) was applied on environmental soil samples collected from Doha city, Qatar. The soils were artificially spiked by soaking them in a mixture of DU and NU. It was observed from sequential experiment that uranium was brought into solution and mainly appeared at steps for dilute acid-soluble, carbonate-bound and organic matter-bound species. Little redistribution was observed at steps for exchangeable and Fe-Mn oxide-bound species. The detection limit of235U and238U isotopes,trueness, precision, specificity, and stability were determined. The recoveries of the uranium through whole extraction procedure were in the range of 87 - 96%.