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  • 1 Ciemat. Metrología. Edificio 3 Avda. Complutense 22 28040 Madrid (Spain)
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In this paper the authors present a study of the adsorption of thorium on manganese dioxide by batch equilibration and cartridge experiments. Some anomalies in the use of MnO2 to concentrate thorium have been found. So the use of this technique is limited for the determination of thorium in natural waters.