http://www.cnr.it/ontology/cnr/individuo/prodotto/ID20043
Direct determination of mercury at the sub-picogram per gram level in polar snow and ice by ICP-SFMS. (Articolo in rivista)
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- Label
- Direct determination of mercury at the sub-picogram per gram level in polar snow and ice by ICP-SFMS. (Articolo in rivista) (literal)
- Anno
- 2004-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1039/b402711f (literal)
- Alternative label
F. A. M. Planchon, P. Gabrielli, P. A. Gauchard, A. Dommergue, C. Barbante, W. R. L. Cairns, G. Cozzi, S. A. Nagorski, C. P. Ferrari, C. F. Boutron, G. Capodaglio, P. Cescon, A. Varga, E. W. Wolff. (2004)
Direct determination of mercury at the sub-picogram per gram level in polar snow and ice by ICP-SFMS.
in Journal of analytical atomic spectrometry (Print)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- F. A. M. Planchon, P. Gabrielli, P. A. Gauchard, A. Dommergue, C. Barbante, W. R. L. Cairns, G. Cozzi, S. A. Nagorski, C. P. Ferrari, C. F. Boutron, G. Capodaglio, P. Cescon, A. Varga, E. W. Wolff. (literal)
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- Univ Venice, CNR, Inst Dynam Environm Proc, I-30123 Venice, Italy
CNRS, Lab Glaciol & Geophys Environm, F-38402 St Martin Dheres, France
Univ Venice, Dept Environm Sci, I-30123 Venice, Italy
Univ Grenoble 1, Inst Univ France, F-38041 Grenoble, France
Univ Grenoble 1, Unite Format & Rech Phys, F-38041 Grenoble, France
Univ Grenoble 1, Observ Sci Univ, Inst Univ France, F-38041 Grenoble, France
British Antarctic Survey, Cambridge CB3 0ET, England (literal)
- Titolo
- Direct determination of mercury at the sub-picogram per gram level in polar snow and ice by ICP-SFMS. (literal)
- Abstract
- n analytical method for the direct determination of mercury (Hg) in polar snow and ice cores and surface snow based on inductively coupled plasma sector field mass spectrometry (ICP-SFMS) has been developed. Various Hg isotopes, such as Hg-199, Hg-200, Hg-201 and Hg-202, appear to be free of polyatomic interferences in such matrices and allow the measurements to be made in low resolution mode, leading to high sensitivity. Ultra-low concentration Hg standards (from 1.5 to 20 pg g(-1)) were used for the calibration of the Thermo Finnigan MAT Element2, and a detection limit as low as 0.18 pg g(-1) was achieved using Hg-202. Ultra-clean procedures used from field sampling to final laboratory analysis show no significant blank contributions and appear suitable for the reliable determination of Hg at ultra-low concentrations. Precision of the Hg measurements was estimated to be 15% in terms of relative standard deviation on five replicates and accuracy was checked with an analytical reference material (102% recovery). Hg concentrations in surface snow samples from the Northern Hemisphere collected in the Canadian Arctic and in Svalbard (Norway) show high variability (1.2-32.0 pg g-(1)). In Antarctica, Hg was determined in different ice core sections from Dome C, spanning the last 18000 years BP (range from 0.7 to 3.2 pg g(-1)), and in snow samples from Coats Land covering the last 150 years (range from 0.2 to 16.1 pg g(-1)). (literal)
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