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Isotope signature characterization of Pb and U in open air by laser-ablation mass spectrometry

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Abstract

Isotope signatures have attracted growing interest in recent years. In addition to the existing mass spectrometric (MS) techniques, demand for open-air and in situ analytical tools is increasing. Laser ablation is effective in atomizing and ionizing materials, and is frequently used in MS. However, light-isotope enrichment in laser-ablated plasma plumes has to be mitigated for accurate isotope analyses. In this letter, we reported an open-air laser-ablation mass spectrometric (OA-LAMS) technique to measure isotope signatures of Pb and U samples without sample pretreatments with improved accuracy in open air. The secondary cations, PbOH+ and UO2OH+, yielded more accurate isotope signatures regardless of environmental changes. This phenomenon was ascribed to different ionization schemes, in which the primary cations came from laser ionization of the samples and the secondary cations came from chemical ionization of the ablated neutral clusters. The results demonstrated the feasibility of the OA-LAMS method for characterizing isotope signatures.

Graphical abstract: Isotope signature characterization of Pb and U in open air by laser-ablation mass spectrometry

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Publication details

The article was received on 12 Apr 2017, accepted on 17 Jul 2017 and first published on 26 Jul 2017


Article type: Paper
DOI: 10.1039/C7JA00142H
Citation: J. Anal. At. Spectrom., 2017, Advance Article
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    Isotope signature characterization of Pb and U in open air by laser-ablation mass spectrometry

    Y. S. Zhou, Y. Lu, M. M. Wang, L. Liu, X. Huang, L. J. Jiang, L. Jiang, J. Silvain and Y. F. Lu, J. Anal. At. Spectrom., 2017, Advance Article , DOI: 10.1039/C7JA00142H

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