| Sequential-pulse laser-induced breakdown spectroscopy of high-pressure bulk aqueous solutions. | |
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MedLine Citation:
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PMID: 17331308 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Sequential-pulse (or dual-pulse) laser-induced breakdown spectroscopy (DP-LIBS) with an orthogonal spark orientation is described for elemental analysis of bulk aqueous solutions at pressures up to approximately 138 x 10(5) Pa (138 bar). The use of sequential laser pulses for excitation, when compared to single-pulse LIBS excitation (SP-LIBS), provides significant emission intensity enhancements for a wide range of elements in bulk solution and allows additional elements to be measured using LIBS. Our current investigations of high-pressure solutions reveal that increasing solution pressure leads to a significant decrease in DP-LIBS emission enhancements for all elements examined, such that we see little or no emission enhancements for pressures above 100 bar. Observed pressure effects on DP-LIBS enhancements are thought to result from pressure effects on the laser-induced bubble formed by the first laser pulse. These results provide insight into the feasibility and limitations of DP-LIBS for in situ multi-elemental detection in high-pressure aqueous environments like the deep ocean. |
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Authors:
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Marion Lawrence-Snyder; Jon Scaffidi; S Michael Angel; Anna P M Michel; Alan D Chave |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Applied spectroscopy Volume: 61 ISSN: 0003-7028 ISO Abbreviation: Appl Spectrosc Publication Date: 2007 Feb |
Date Detail:
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Created Date: 2007-03-02 Completed Date: 2007-04-02 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0372406 Medline TA: Appl Spectrosc Country: United States |
Other Details:
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Languages: eng Pagination: 171-6 Citation Subset: - |
Affiliation:
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Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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