Precise/ Small Sample Size Determinations of Lithium Isotopic Compositions of Geological Reference Materials and Modern Seawater by MC-ICP-MS |
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| Authors: | Alistair B Jeffcoate Tim Elliott Alex Thomas Claudia Bouman |
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| Institution: | Department of Earth Sciences, University of Bristol, Wills Memorial Building, Queen's Road, Bristol BS8 1 RJ, UK;Department of Earth Sciences, Parks Road, Oxford OX1 3PR, UK;ThermoFinnigan MAT, Bremen, Germany |
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| Abstract: | The Li isotope ratios of four international rock reference materials, USGS BHVO-2, GSJ JB-2, JG-2, JA-1 and modern seawater (Mediterranean, Pacific and North Atlantic) were determined using multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS). These reference materials of natural samples were chosen to span a considerable range in Li isotope ratios and cover several different matrices in order to provide a useful benchmark for future studies. Our new analytical technique achieves significantly higher precision and reproducibility (< ± O.3%o 2s) than previous methods, with the additional advantage of requiring very low sample masses of ca . 2 ng of Li. |
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| Keywords: | Keywords: Li isotopic composition silicate reference materials seawater MC-ICP-MS Li standard |
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