Study of matrix effects in laser plasma spectroscopy by shock wave propagation

R. Krasniker, V. Bulatov, I. Schechter*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

The origin of analytical matrix effects in laser plasma spectroscopy was investigated. We focused on matrix effects in sand/soil mixtures and attempted to explain the increase in the spectral response of trace elements (at constant concentration) with sand percentage. First, it was found that the energy coupled in the plasma, and which can be calculated from the propagation of the laser induced shock wave, indeed characterizes the matrix. A simple experimental setup for such measurements was suggested. Our results indicate that previous explanations of the matrix effects in this system may not be correct. We suggested that the main matrix effects were attributed to the depth of the laser-induced crater, which was correlated to a portion of the laser energy that penetrates into sand particulates and does not cause direct ablation. This explanation holds when no other effects are present (e.g. grain size distribution). The hypothesis was validated by experimental data.

Original languageEnglish
Pages (from-to)609-618
Number of pages10
JournalSpectrochimica Acta, Part B: Atomic Spectroscopy
Volume56
Issue number6
DOIs
StatePublished - 29 Jun 2001
Externally publishedYes

Keywords

  • Breakdown
  • Laser analysis
  • Matrix
  • Plasma spectroscopy
  • Shock-wave

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