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Updated: Aug 25, 2026

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
Published on: May 20, 2019
A separation method to overcome the interference of calcium on the uranium determination by ICP-ES
O A Zaror1, R S Juarez, E Zeiller
1IAEA Laboratories Seibersdorf, PO Box 100, A-1400, Vienna, Austria.
Abstract:
The accurate determination of uranium by Inductively Coupled Plasma Emission Spectrometry (ICP-ES) in calcium phosphate matrix suffers from a severe ionization interference due to the high calcium content of the samples. This leads to a signal depression up to 30%. For reliable determinations an extraction method based on anion exchange resin column chromatography is described which separates uranium for the needs in ICP-ES measurements. The results are comparable with results obtained by other determination methods. In addition, reference materials were measured to verify this extraction procedure.
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