Details
| Originalsprache | Englisch |
|---|---|
| Fachzeitschrift | Geochemistry, Geophysics, Geosystems |
| Jahrgang | 2 |
| Ausgabenummer | 12 |
| Publikationsstatus | Veröffentlicht - 1 Dez. 2001 |
| Extern publiziert | Ja |
Abstract
The application of multiple collector inductively coupled plasma source mass spectrometry (MC-ICPMS) to 176Lu-176Hf and 92Nb-92Zr chronometry has been hampered by complex Zr-Hf purification procedures that involve multiple ion exchange column steps. This study presents a single-column separation procedure for purification of Hf and Lu by ion exchange using Eichrom® Ln-Spec resin. The sample is loaded in pure HCl, and element yields are not dependent on the sample matrix. For 92Nb-92Zr chronometry, a one-column procedure for purification of Zr using Biorad® AG-1-× 8 resin is described. Titanium and Mo are completely removed from the Zr, thus enabling accurate 92Zr measurements. Zirconium and Nb are quantitatively separated from rock samples using Eichrom Ln-Spec resin, allowing measurements of Zr/Nb with a precision of better than ±5% (2σ). The Ln-Spec and anion resin procedures may be combined into a three-column method for separation of Zr-Nb, Hf, Ta, and Lu from rock samples. For the first time, this procedure permits combined isotope dilution measurements of Nb/Ta, Zr/Hf, and Lu/Hf using a mixed 94Zr-176Lu-180Hf-180Ta tracer. Analytical protocols for Zr and Hf isotope measurements using the Micromass Isoprobe, a second generation, single-focusing MC-ICPMS, are reported. Using the Isoprobe at Münster, 2σ external precisions of ±0.5ε units for Hf and Zr isotope measurements are achieved using as little as 5 ng (Hf) to 10 ng (Zr) of the element. The 176Hf/177Hf and Lu/Hf for rock reference materials agree well with other published MC-ICPMS and thermal ionization mass spectrometry (TIMS) data.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Geophysik
- Erdkunde und Planetologie (insg.)
- Geochemie und Petrologie
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in: Geochemistry, Geophysics, Geosystems, Jahrgang 2, Nr. 12, 01.12.2001.
Publikation: Beitrag in Fachzeitschrift › Übersichtsarbeit › Forschung › Peer-Review
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TY - JOUR
T1 - Separation of high field strength elements (Nb, Ta, Zr, Hf) and Lu from rock samples for MC-ICPMS measurements
AU - Münker, Carsten
AU - Weyer, Stefan
AU - Scherer, Erik
AU - Mezger, Klaus
PY - 2001/12/1
Y1 - 2001/12/1
N2 - The application of multiple collector inductively coupled plasma source mass spectrometry (MC-ICPMS) to 176Lu-176Hf and 92Nb-92Zr chronometry has been hampered by complex Zr-Hf purification procedures that involve multiple ion exchange column steps. This study presents a single-column separation procedure for purification of Hf and Lu by ion exchange using Eichrom® Ln-Spec resin. The sample is loaded in pure HCl, and element yields are not dependent on the sample matrix. For 92Nb-92Zr chronometry, a one-column procedure for purification of Zr using Biorad® AG-1-× 8 resin is described. Titanium and Mo are completely removed from the Zr, thus enabling accurate 92Zr measurements. Zirconium and Nb are quantitatively separated from rock samples using Eichrom Ln-Spec resin, allowing measurements of Zr/Nb with a precision of better than ±5% (2σ). The Ln-Spec and anion resin procedures may be combined into a three-column method for separation of Zr-Nb, Hf, Ta, and Lu from rock samples. For the first time, this procedure permits combined isotope dilution measurements of Nb/Ta, Zr/Hf, and Lu/Hf using a mixed 94Zr-176Lu-180Hf-180Ta tracer. Analytical protocols for Zr and Hf isotope measurements using the Micromass Isoprobe, a second generation, single-focusing MC-ICPMS, are reported. Using the Isoprobe at Münster, 2σ external precisions of ±0.5ε units for Hf and Zr isotope measurements are achieved using as little as 5 ng (Hf) to 10 ng (Zr) of the element. The 176Hf/177Hf and Lu/Hf for rock reference materials agree well with other published MC-ICPMS and thermal ionization mass spectrometry (TIMS) data.
AB - The application of multiple collector inductively coupled plasma source mass spectrometry (MC-ICPMS) to 176Lu-176Hf and 92Nb-92Zr chronometry has been hampered by complex Zr-Hf purification procedures that involve multiple ion exchange column steps. This study presents a single-column separation procedure for purification of Hf and Lu by ion exchange using Eichrom® Ln-Spec resin. The sample is loaded in pure HCl, and element yields are not dependent on the sample matrix. For 92Nb-92Zr chronometry, a one-column procedure for purification of Zr using Biorad® AG-1-× 8 resin is described. Titanium and Mo are completely removed from the Zr, thus enabling accurate 92Zr measurements. Zirconium and Nb are quantitatively separated from rock samples using Eichrom Ln-Spec resin, allowing measurements of Zr/Nb with a precision of better than ±5% (2σ). The Ln-Spec and anion resin procedures may be combined into a three-column method for separation of Zr-Nb, Hf, Ta, and Lu from rock samples. For the first time, this procedure permits combined isotope dilution measurements of Nb/Ta, Zr/Hf, and Lu/Hf using a mixed 94Zr-176Lu-180Hf-180Ta tracer. Analytical protocols for Zr and Hf isotope measurements using the Micromass Isoprobe, a second generation, single-focusing MC-ICPMS, are reported. Using the Isoprobe at Münster, 2σ external precisions of ±0.5ε units for Hf and Zr isotope measurements are achieved using as little as 5 ng (Hf) to 10 ng (Zr) of the element. The 176Hf/177Hf and Lu/Hf for rock reference materials agree well with other published MC-ICPMS and thermal ionization mass spectrometry (TIMS) data.
KW - hafnium
KW - Ln Spec
KW - niobium
KW - Separation
KW - tantalum
KW - zirconium
UR - http://www.scopus.com/inward/record.url?scp=84955206671&partnerID=8YFLogxK
U2 - 10.1029/2001GC000183
DO - 10.1029/2001GC000183
M3 - Review article
AN - SCOPUS:84955206671
VL - 2
JO - Geochemistry, Geophysics, Geosystems
JF - Geochemistry, Geophysics, Geosystems
SN - 1525-2027
IS - 12
ER -