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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 3 — Mar. 7, 2007

Sequential-Pulse Laser-Induced Breakdown Spectroscopy of High-Pressure Bulk Aqueous Solutions

Marion Lawrence-Snyder, Jon Scaffidi, S. Michael Angel, Anna P. M. Michel, and Alan D. Chave

Applied Spectroscopy, Vol. 61, Issue 2, pp. 171-176 (2007)


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Abstract

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 ∼138 × 105 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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Vol. 2, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Marion Lawrence-Snyder, Jon Scaffidi, S. Michael Angel, Anna P. M. Michel, and Alan D. Chave, "Sequential-Pulse Laser-Induced Breakdown Spectroscopy of High-Pressure Bulk Aqueous Solutions," Appl. Spectrosc. 61, 171-176 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=as-61-2-171

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