Magnesium Isotope Compositions of Natural Reference Materials
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Non |
| Statut de publication | : | Publié |
| Année de publication | : | 2009 |
| Auteurs (4) | : | BOLOU-BI Emile,b VIGIER Nathalie BRENOT A POSZWA A |
| Revue scientifique | : | Geostandards and Geoanalytical Research |
| Volume | : | 33 |
| Fascicule | : | 1 |
| Pages | : | 95-109 |
| DOI | : | 10.1111/j.1751-908X.2009.00884.x |
| URL | : | <go to isi>://wos:000263520400008 |
| Abstract | : | This study presents a chemical protocol for the separation of Mg that is particularly adapted to alkali-rich samples (granite, soil, plants). This protocol was based on a combination of two pre-existing methods: transition metals were first removed from the sample using an AG-MP1 anion-exchange resin, followed by the separation of alkalis (Na, K) and bivalent cations (Ca(2+), Mn(2+) and Sr(2+)) using a AG50W-X12 cation-exchange resin. This procedure allowed Mg recovery of similar to 10 0 +/- 8%. The [Sigma cations]/[Mg] molar ratios in all of the final Mg fractions were lower than 0.05. The Mg isotope ratios of eleven reference materials were analysed using two different MC-ICP-MS instruments (Isoprobe and Nu Plasma). The long-term reproducibility, assessed by repeated measurements of Mg standard solutions and natural reference materials, was 0.14 parts per thousand. The basalt (BE-N), limestone (Cal-S) and seawater (BCR-403) reference materials analysed in this study yielded delta(26)Mg mean values of -0.28 +/- 0.08 parts per thousand, -4.37 +/- 0.11 parts per thousand and -0.89 +/- 0.10 parts per thousand respectively, in agreement with published data. The two continental rocks analysed, diorite (DR-N) and granite (GA), yielded delta(26)Mg mean values of -0.50 +/- 0.08 parts per thousand and -0.75 +/- 0.14 parts per thousand, respectively. The weathering products, soil (TILL-1) and river water (NIST SRM 1640), gave delta(26)Mg values of -0.40 +/- 0.07 parts per thousand and -1.27 +/- 0.14 parts per thousand, respectively. We also present, for the first time, the Mg isotope composition of bulk plant and organic matter. Rye flour (BCR-381), sea lettuce (Ulva lactuva) (BCR-279), natural hairgrass (Deschampsia flexuosa) and lichen (BCR-482) reference materials gave delta(26)Mg values of -1.10 +/- 0.14 parts per thousand, -0.90 +/- 0.19 parts per thousand, -0.50 +/- 0.22 parts per thousand and -1.15 +/- 0.27 parts per thousand respectively. Plant delta(26)Mg values fell within the range defined by published data for chlorophylls. |
| Mots-clés | : | - |
| Commentaire | : | Times Cited: 32 Emile B., Bolou Bi/A-7478-2011 32 |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Bolou-Bi EB, Vigier N, Brenot A, Poszwa A (2009) Magnesium Isotope Compositions of Natural Reference Materials. Geostand Geoanall Res 33: 95-109 | doi: 10.1111/j.1751-908X.2009.00884.x
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