Single Column Sequential Extraction of Ra,Nd, Th,Pa and U from a Natural Sample |
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Authors: | Catherine Jeandel Celia Venchiarutti Michael Bourquin Catherine Pradoux François Lacan Pieter van Beek Jean Riotte |
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Institution: | 1. LEGOS (CNRS/CNES/IRD/Université de Toulouse), Observatoire Midi‐Pyrénées, 14 Avenue Edouard Belin, 31400, Toulouse, France;2. LMTG (CNRS/IRD/Université de Toulouse), Observatoire Midi‐Pyrénées, 14 Avenue Edouard Belin, 31400 Toulouse, France |
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Abstract: | A new procedure allowing the sequential extraction of Ra, Nd, Th, Pa and U from the same initial natural sample (sea or river waters, particles, sediments, rocks) is proposed. Extraction recoveries were better than 90%. Procedural blanks ranged from 80 pg (for Nd) to below 1 fg, the detection limit of the MC‐ICP‐MS used (for Pa); all were negligible compared with the amounts of elements currently determined. Based on classical anionic resins attached to a peristaltic pump allowing precise flow rate control, this procedure allowed a consequent reduction of the sample size, which improved the sampling resolution and reduced the sampling cost. It also ensured a better consistency of the samples for the five tracers. |
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Keywords: | chemical extraction chromatography isotopes natural samples marine geochemistry radium neodymium thorium protactinium uranium extraction chimique isotopes é chantillons naturels gé ochimie marine radium né odyme thorium protactinium uranium |
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