Abstract
A technique for separation of Mg, with 100% yield from low-Mg biogenic carbonates has been developed suitable for high precision analysis of Mg isotopes by multiple-collector inductively coupled plasma mass spectrometry. Two separate stages of ion-exchange chromatography were carried out using cation exchange resin, AG50W-X12 with a Mg recovery >99.9%. The repeatability of the Mg isotope ratio measurement using this technique including chemistry and mass spectrometry is ±0.14‰ on δ26Mg and ±0.09‰ on δ25Mg at 95% confidence. This was demonstrated using a synthetic solution (Na : Mg : Ca : Sr = 2 : 1 : 100 : 1 in weight) over a period of six months. The robustness of the technique was further assessed by replicate analyses of three natural samples, seawater, foraminifera and dolomite. A total variation over 4.5‰ on δ26Mg was observed and the Mg isotope composition of seawater was 2.59 ± 0.14‰ on δ26Mg and 1.33 ± 0.09‰ on δ25Mg which were the highest isotope ratios among the samples measured.
| Original language | English |
|---|---|
| Pages (from-to) | 296-301 |
| Number of pages | 6 |
| Journal | Journal of Analytical Atomic Spectrometry |
| Volume | 18 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2003 |
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ASJC Scopus subject areas
- Spectroscopy
Cite this
Purification of Mg from low-Mg biogenic carbonates for isotope ratio determination using multiple collector ICP-MS. / Chang, Veronica T C; Makishima, Akio; Belshaw, Nick S.; O'Nions, R. Keith.
In: Journal of Analytical Atomic Spectrometry, Vol. 18, No. 4, 2003, p. 296-301.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Purification of Mg from low-Mg biogenic carbonates for isotope ratio determination using multiple collector ICP-MS
AU - Chang, Veronica T C
AU - Makishima, Akio
AU - Belshaw, Nick S.
AU - O'Nions, R. Keith
PY - 2003
Y1 - 2003
N2 - A technique for separation of Mg, with 100% yield from low-Mg biogenic carbonates has been developed suitable for high precision analysis of Mg isotopes by multiple-collector inductively coupled plasma mass spectrometry. Two separate stages of ion-exchange chromatography were carried out using cation exchange resin, AG50W-X12 with a Mg recovery >99.9%. The repeatability of the Mg isotope ratio measurement using this technique including chemistry and mass spectrometry is ±0.14‰ on δ26Mg and ±0.09‰ on δ25Mg at 95% confidence. This was demonstrated using a synthetic solution (Na : Mg : Ca : Sr = 2 : 1 : 100 : 1 in weight) over a period of six months. The robustness of the technique was further assessed by replicate analyses of three natural samples, seawater, foraminifera and dolomite. A total variation over 4.5‰ on δ26Mg was observed and the Mg isotope composition of seawater was 2.59 ± 0.14‰ on δ26Mg and 1.33 ± 0.09‰ on δ25Mg which were the highest isotope ratios among the samples measured.
AB - A technique for separation of Mg, with 100% yield from low-Mg biogenic carbonates has been developed suitable for high precision analysis of Mg isotopes by multiple-collector inductively coupled plasma mass spectrometry. Two separate stages of ion-exchange chromatography were carried out using cation exchange resin, AG50W-X12 with a Mg recovery >99.9%. The repeatability of the Mg isotope ratio measurement using this technique including chemistry and mass spectrometry is ±0.14‰ on δ26Mg and ±0.09‰ on δ25Mg at 95% confidence. This was demonstrated using a synthetic solution (Na : Mg : Ca : Sr = 2 : 1 : 100 : 1 in weight) over a period of six months. The robustness of the technique was further assessed by replicate analyses of three natural samples, seawater, foraminifera and dolomite. A total variation over 4.5‰ on δ26Mg was observed and the Mg isotope composition of seawater was 2.59 ± 0.14‰ on δ26Mg and 1.33 ± 0.09‰ on δ25Mg which were the highest isotope ratios among the samples measured.
UR - http://www.scopus.com/inward/record.url?scp=0038373603&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0038373603&partnerID=8YFLogxK
U2 - 10.1039/b210977h
DO - 10.1039/b210977h
M3 - Article
AN - SCOPUS:0038373603
VL - 18
SP - 296
EP - 301
JO - Journal of Analytical Atomic Spectrometry
JF - Journal of Analytical Atomic Spectrometry
SN - 0267-9477
IS - 4
ER -