Calibration effects for laser-induced breakdown spectroscopy of gaseous sample streams: Analyte response of gas-phase species versus solid-phase species

V. Hohreiter, D. W. Hahn

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

The effects of analyte phase on the calibration response for laser-induced breakdown spectroscopy is investigated for a range of carbon species. Significant differences in the atomic emission signal from carbon were observed when comparing calibration streams of gas-phase and submicrometer-sized solid-phase carbon species. The resulting calibration curve slopes varied by a factor of 8 over a comparable range of atomic carbon concentrations for five different analyte sources, while the plasma electron density and temperature remained essentially constant. The current findings challenge a widely held assumption that complete dissociation of constituent species within a highly energetic laser-induced plasma results in independence of the analyte atomic emission signal on the analyte source. A physical model of the plasma-analyte interaction is proposed that provides a framework to account for the observed dependence on the physical state of the analyte.

Original languageEnglish (US)
Pages (from-to)1118-1124
Number of pages7
JournalAnalytical Chemistry
Volume77
Issue number4
DOIs
StatePublished - Feb 15 2005
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry

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