An ultra-clean technique for accurately analysing Pb isotopes and heavy metals at high spatial resolution in ice cores with sub-pg g(-1) Pb concentrations.
Measurements of Pb isotope ratios in ice containing sub-pg g(-1) concentrations are easily compromised by contamination, particularly where limited sample is available. Improved techniques are essential if Antarctic ice cores are to be analysed with sufficient spatial resolution to reveal seasonal v...
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ftansto:oai:apo-prod.ansto.gov.au:10238/1994 2023-05-15T13:36:16+02:00 An ultra-clean technique for accurately analysing Pb isotopes and heavy metals at high spatial resolution in ice cores with sub-pg g(-1) Pb concentrations. Burn, LJ Roseman, KJR Candelone, JP Vallelonga, P Burton, GR Smith, AM Morgan, VI Barbante, C Hong, S Boutron, CF 2009-02-23 http://apo.ansto.gov.au/dspace/handle/10238/1994 https://doi.org/10.1016/j.aca.2008.11.067 en eng Elsevier Burn, L. J., Rosman, K. J. R., Candelone, J. P., Vallelonga, P., Burton, G. R., Smith, A. M., Morgan, V. I., Barbante, C., Hone, S., & Boutron, C. F. (2009). An ultra-clean technique for accurately analysing Pb isotopes and heavy metals at high spatial resolution in ice cores with sub-pg g(-1) Pb concentrations. Analytica Chimica Acta, 634(2), 228-236. doi:10.1016/j.aca.2008.11.067 0003-2670 http://dx.doi.org/10.1016/j.aca.2008.11.067 http://apo.ansto.gov.au/dspace/handle/10238/1994 Antarctica Ice Mass Spectroscopy Lead Isotopes Barium Indium Journal Article 2009 ftansto https://doi.org/10.1016/j.aca.2008.11.067 2020-04-13T22:28:26Z Measurements of Pb isotope ratios in ice containing sub-pg g(-1) concentrations are easily compromised by contamination, particularly where limited sample is available. Improved techniques are essential if Antarctic ice cores are to be analysed with sufficient spatial resolution to reveal seasonal variations due to climate. This was achieved here by using stainless steel chisels and saws and strict protocols in an ultra-clean cold room to decontaminate and section ice cores. Artificial ice cores, prepared from high purity water were used to develop and refine the procedures and quantify blanks. Ba and In, two other important elements present at pg g-1 and fg g(-1) concentrations in Polar ice, were also measured. The final blank amounted to 0.2 +/- 0.2 pg of Pb with Pb-206/Pb-207 and Pb-208/Pb-207 ratios of 1.16 +/- 0.12 and 2.35 +/- 0.16, respectively, 1.5 +/- 0.4 pg of Ba and 0.6 +/- 2.0 fg of In, most of which probably originates from abrasion of the steel saws by the ice. The procedure was demonstrated on a Holocene Antarctic ice core section and was shown to contribute blanks of only similar to 5%, similar to 14% and similar to 0.8% to monthly resolved samples with respective Pb, Ba and In concentrations of 0.12 pg g(-1), 0.3 pg g(-1) and 2.3 fg g(-1). Uncertainties in the Pb isotopic ratio measurements were degraded by only similar to 0.2%. © 2009, Elsevier Ltd. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Australian Nuclear Science and Technology Organisation: ANSTO Publications Online Antarctic Analytica Chimica Acta 634 2 228 236 |
institution |
Open Polar |
collection |
Australian Nuclear Science and Technology Organisation: ANSTO Publications Online |
op_collection_id |
ftansto |
language |
English |
topic |
Antarctica Ice Mass Spectroscopy Lead Isotopes Barium Indium |
spellingShingle |
Antarctica Ice Mass Spectroscopy Lead Isotopes Barium Indium Burn, LJ Roseman, KJR Candelone, JP Vallelonga, P Burton, GR Smith, AM Morgan, VI Barbante, C Hong, S Boutron, CF An ultra-clean technique for accurately analysing Pb isotopes and heavy metals at high spatial resolution in ice cores with sub-pg g(-1) Pb concentrations. |
topic_facet |
Antarctica Ice Mass Spectroscopy Lead Isotopes Barium Indium |
description |
Measurements of Pb isotope ratios in ice containing sub-pg g(-1) concentrations are easily compromised by contamination, particularly where limited sample is available. Improved techniques are essential if Antarctic ice cores are to be analysed with sufficient spatial resolution to reveal seasonal variations due to climate. This was achieved here by using stainless steel chisels and saws and strict protocols in an ultra-clean cold room to decontaminate and section ice cores. Artificial ice cores, prepared from high purity water were used to develop and refine the procedures and quantify blanks. Ba and In, two other important elements present at pg g-1 and fg g(-1) concentrations in Polar ice, were also measured. The final blank amounted to 0.2 +/- 0.2 pg of Pb with Pb-206/Pb-207 and Pb-208/Pb-207 ratios of 1.16 +/- 0.12 and 2.35 +/- 0.16, respectively, 1.5 +/- 0.4 pg of Ba and 0.6 +/- 2.0 fg of In, most of which probably originates from abrasion of the steel saws by the ice. The procedure was demonstrated on a Holocene Antarctic ice core section and was shown to contribute blanks of only similar to 5%, similar to 14% and similar to 0.8% to monthly resolved samples with respective Pb, Ba and In concentrations of 0.12 pg g(-1), 0.3 pg g(-1) and 2.3 fg g(-1). Uncertainties in the Pb isotopic ratio measurements were degraded by only similar to 0.2%. © 2009, Elsevier Ltd. |
format |
Article in Journal/Newspaper |
author |
Burn, LJ Roseman, KJR Candelone, JP Vallelonga, P Burton, GR Smith, AM Morgan, VI Barbante, C Hong, S Boutron, CF |
author_facet |
Burn, LJ Roseman, KJR Candelone, JP Vallelonga, P Burton, GR Smith, AM Morgan, VI Barbante, C Hong, S Boutron, CF |
author_sort |
Burn, LJ |
title |
An ultra-clean technique for accurately analysing Pb isotopes and heavy metals at high spatial resolution in ice cores with sub-pg g(-1) Pb concentrations. |
title_short |
An ultra-clean technique for accurately analysing Pb isotopes and heavy metals at high spatial resolution in ice cores with sub-pg g(-1) Pb concentrations. |
title_full |
An ultra-clean technique for accurately analysing Pb isotopes and heavy metals at high spatial resolution in ice cores with sub-pg g(-1) Pb concentrations. |
title_fullStr |
An ultra-clean technique for accurately analysing Pb isotopes and heavy metals at high spatial resolution in ice cores with sub-pg g(-1) Pb concentrations. |
title_full_unstemmed |
An ultra-clean technique for accurately analysing Pb isotopes and heavy metals at high spatial resolution in ice cores with sub-pg g(-1) Pb concentrations. |
title_sort |
ultra-clean technique for accurately analysing pb isotopes and heavy metals at high spatial resolution in ice cores with sub-pg g(-1) pb concentrations. |
publisher |
Elsevier |
publishDate |
2009 |
url |
http://apo.ansto.gov.au/dspace/handle/10238/1994 https://doi.org/10.1016/j.aca.2008.11.067 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica ice core |
op_relation |
Burn, L. J., Rosman, K. J. R., Candelone, J. P., Vallelonga, P., Burton, G. R., Smith, A. M., Morgan, V. I., Barbante, C., Hone, S., & Boutron, C. F. (2009). An ultra-clean technique for accurately analysing Pb isotopes and heavy metals at high spatial resolution in ice cores with sub-pg g(-1) Pb concentrations. Analytica Chimica Acta, 634(2), 228-236. doi:10.1016/j.aca.2008.11.067 0003-2670 http://dx.doi.org/10.1016/j.aca.2008.11.067 http://apo.ansto.gov.au/dspace/handle/10238/1994 |
op_doi |
https://doi.org/10.1016/j.aca.2008.11.067 |
container_title |
Analytica Chimica Acta |
container_volume |
634 |
container_issue |
2 |
container_start_page |
228 |
op_container_end_page |
236 |
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1766076195158360064 |