High-sensitivity measurements of strontium isotopes in polar ice
Techniques have been developed to measure the isotopic composition and concentration of Sr at sub-nanogram per gram levels in polar snow and ice samples. A 84Sr spike was used to determine Sr concentrations on a single sample aliquot of a few millilitre. Microlitre scale columns of Sr-Spec resin wer...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
Elsevier
2002
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| Online Access: | http://hdl.handle.net/20.500.11937/45247 |
| _version_ | 1848757229269811200 |
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| author | Burton, Graeme Boutron, C. Rosman, Kevin |
| author_facet | Burton, Graeme Boutron, C. Rosman, Kevin |
| author_sort | Burton, Graeme |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Techniques have been developed to measure the isotopic composition and concentration of Sr at sub-nanogram per gram levels in polar snow and ice samples. A 84Sr spike was used to determine Sr concentrations on a single sample aliquot of a few millilitre. Microlitre scale columns of Sr-Spec resin were used to purify Sr samples. Thermal ionisation mass spectrometry (TIMS) was used to measure the Sr isotopic ratios. A single TIMS measurement of the Sr sample yielded both isotopic composition and concentration after deconvolution of spike and sample spectra. This allows isotopic variations in Sr to be used to identify source regions of crustal dust. Early Holocene and last glacial maximum ice core samples from both Antarctica and Greenland were analysed to demonstrate the applicability of the technique. Sr isotopes were analysed in 20 g sized samples of Antarctic early Holocene ice where the concentration was only 31 pg g−1. This represents an improvement of two orders of magnitude in sample consumption over previous studies allowing for a much higher time resolution in the analysis of polar ice cores. |
| first_indexed | 2025-11-14T09:24:46Z |
| format | Journal Article |
| id | curtin-20.500.11937-45247 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:24:46Z |
| publishDate | 2002 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-452472017-09-13T15:57:24Z High-sensitivity measurements of strontium isotopes in polar ice Burton, Graeme Boutron, C. Rosman, Kevin Techniques have been developed to measure the isotopic composition and concentration of Sr at sub-nanogram per gram levels in polar snow and ice samples. A 84Sr spike was used to determine Sr concentrations on a single sample aliquot of a few millilitre. Microlitre scale columns of Sr-Spec resin were used to purify Sr samples. Thermal ionisation mass spectrometry (TIMS) was used to measure the Sr isotopic ratios. A single TIMS measurement of the Sr sample yielded both isotopic composition and concentration after deconvolution of spike and sample spectra. This allows isotopic variations in Sr to be used to identify source regions of crustal dust. Early Holocene and last glacial maximum ice core samples from both Antarctica and Greenland were analysed to demonstrate the applicability of the technique. Sr isotopes were analysed in 20 g sized samples of Antarctic early Holocene ice where the concentration was only 31 pg g−1. This represents an improvement of two orders of magnitude in sample consumption over previous studies allowing for a much higher time resolution in the analysis of polar ice cores. 2002 Journal Article http://hdl.handle.net/20.500.11937/45247 10.1016/S0003-2670(02)00720-1 Elsevier restricted |
| spellingShingle | Burton, Graeme Boutron, C. Rosman, Kevin High-sensitivity measurements of strontium isotopes in polar ice |
| title | High-sensitivity measurements of strontium isotopes in polar ice |
| title_full | High-sensitivity measurements of strontium isotopes in polar ice |
| title_fullStr | High-sensitivity measurements of strontium isotopes in polar ice |
| title_full_unstemmed | High-sensitivity measurements of strontium isotopes in polar ice |
| title_short | High-sensitivity measurements of strontium isotopes in polar ice |
| title_sort | high-sensitivity measurements of strontium isotopes in polar ice |
| url | http://hdl.handle.net/20.500.11937/45247 |