Abstract
A high-yield lithium separation technique for rock and aqueous samples has been established together with precise Li isotope analysis by thermal ionization mass spectrometry. Four separate stages of ion-exchange chromatography were carried out using organic ion-exchange resin. An ethanol-HCl solution was used for complete separation of Li from Na at the third column stage. Total reagent volume for the entire chemical process was reduced to 42 ml and 33.3 ml for rock samples and seawater, respectively. The recovery yield and total procedural blank are 99.2-99.3% and 11 pg, respectively. Li3PO4 was used as an ion-source material in the mass spectrometric analysis. The in-run precision and reproducibility of measured 7Li/6Li ratios were ±0.04-0.07‰ (2σmean) and 0.37‰ (relative standard deviation; RSD) for rock and ±0.05-0.08‰ (2σmean) and 0.35‰ (RSD) for seawater. In this method, Rb, Sr, Sm, Nd, La and Ce can be collected after Li elution in the first column chromatography, then separated by the following specific procedures for these elements. Therefore, this method makes possible multi-isotope analysis for Li-poor and restricted small amounts of samples such as meteorites and mantle materials, extending to Li isotope geochemistry and cosmochemistry.
| Original language | English |
|---|---|
| Pages (from-to) | 91-104 |
| Number of pages | 14 |
| Journal | Chemical Geology |
| Volume | 145 |
| Issue number | 1-2 |
| Publication status | Published - Mar 6 1998 |
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Keywords
- Geochemical tracer
- High-precision isotope analysis
- Li isotope
- Li phosphate
- Recovery yield
- TIMS
ASJC Scopus subject areas
- Geochemistry and Petrology
Cite this
High-yield lithium separation and the precise isotopic analysis for natural rock and aqueous samples. / Moriguti, Takuya; Nakamura, Eizou.
In: Chemical Geology, Vol. 145, No. 1-2, 06.03.1998, p. 91-104.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - High-yield lithium separation and the precise isotopic analysis for natural rock and aqueous samples
AU - Moriguti, Takuya
AU - Nakamura, Eizou
PY - 1998/3/6
Y1 - 1998/3/6
N2 - A high-yield lithium separation technique for rock and aqueous samples has been established together with precise Li isotope analysis by thermal ionization mass spectrometry. Four separate stages of ion-exchange chromatography were carried out using organic ion-exchange resin. An ethanol-HCl solution was used for complete separation of Li from Na at the third column stage. Total reagent volume for the entire chemical process was reduced to 42 ml and 33.3 ml for rock samples and seawater, respectively. The recovery yield and total procedural blank are 99.2-99.3% and 11 pg, respectively. Li3PO4 was used as an ion-source material in the mass spectrometric analysis. The in-run precision and reproducibility of measured 7Li/6Li ratios were ±0.04-0.07‰ (2σmean) and 0.37‰ (relative standard deviation; RSD) for rock and ±0.05-0.08‰ (2σmean) and 0.35‰ (RSD) for seawater. In this method, Rb, Sr, Sm, Nd, La and Ce can be collected after Li elution in the first column chromatography, then separated by the following specific procedures for these elements. Therefore, this method makes possible multi-isotope analysis for Li-poor and restricted small amounts of samples such as meteorites and mantle materials, extending to Li isotope geochemistry and cosmochemistry.
AB - A high-yield lithium separation technique for rock and aqueous samples has been established together with precise Li isotope analysis by thermal ionization mass spectrometry. Four separate stages of ion-exchange chromatography were carried out using organic ion-exchange resin. An ethanol-HCl solution was used for complete separation of Li from Na at the third column stage. Total reagent volume for the entire chemical process was reduced to 42 ml and 33.3 ml for rock samples and seawater, respectively. The recovery yield and total procedural blank are 99.2-99.3% and 11 pg, respectively. Li3PO4 was used as an ion-source material in the mass spectrometric analysis. The in-run precision and reproducibility of measured 7Li/6Li ratios were ±0.04-0.07‰ (2σmean) and 0.37‰ (relative standard deviation; RSD) for rock and ±0.05-0.08‰ (2σmean) and 0.35‰ (RSD) for seawater. In this method, Rb, Sr, Sm, Nd, La and Ce can be collected after Li elution in the first column chromatography, then separated by the following specific procedures for these elements. Therefore, this method makes possible multi-isotope analysis for Li-poor and restricted small amounts of samples such as meteorites and mantle materials, extending to Li isotope geochemistry and cosmochemistry.
KW - Geochemical tracer
KW - High-precision isotope analysis
KW - Li isotope
KW - Li phosphate
KW - Recovery yield
KW - TIMS
UR - http://www.scopus.com/inward/record.url?scp=0031845241&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031845241&partnerID=8YFLogxK
M3 - Article
VL - 145
SP - 91
EP - 104
JO - Chemical Geology
JF - Chemical Geology
SN - 0009-2541
IS - 1-2
ER -