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- Title
Comparison of detection limits, for two metallic matrices, of laser-induced breakdown spectroscopy in the single and double-pulse configurations.
- Authors
Ismail, Marwa A.; Cristoforetti, Gabriele; Legnaioli, Stefano; Pardini, Lorenzo; Palleschi, Vincenzo; Salvetti, Azenio; Tognoni, Elisabetta; Harith, Mohamed A.
- Abstract
Limits of detection have been studied for several elements in aluminium and steel alloys, at atmospheric pressure in air, by use of the single and collinear double-pulse configurations of laser-induced breakdown spectroscopy. For this purpose, calibration plots were constructed for Mg, Al, Si, Ti, Cr, Mn, Fe, Ni, and Cu using a set of certified aluminium alloy samples and a set of certified steel samples. The investigation included optimization of the experimental conditions to furnish the best signal-to-noise ratio. Inter-pulse delay, gate width, and acquisition delay were studied. The detection limits for the elements of interest were calculated under the optimum conditions for the double-pulse configuration and compared with those obtained under the optimum conditions for single-pulse configuration. Significantly improved detection limits were achieved, for all the elements investigated, and in both aluminium and steel, by use of the double-pulse configuration. The experimental findings are discussed in terms of the measured plasma conditions (particle and electron density, and temperature).
- Subjects
LASER spectroscopy; ALUMINUM alloys; STEEL alloys; ATMOSPHERIC pressure; ELECTRON distribution
- Publication
Analytical & Bioanalytical Chemistry, 2006, Vol 385, Issue 2, p316
- ISSN
1618-2642
- Publication type
Article
- DOI
10.1007/s00216-006-0363-z