Analytical and Bioanalytical Chemistry

, Volume 385, Issue 2, pp 316–325

Comparison of detection limits, for two metallic matrices, of laser-induced breakdown spectroscopy in the single and double-pulse configurations

  • Marwa A. Ismail
  • Gabriele Cristoforetti
  • Stefano Legnaioli
  • Lorenzo Pardini
  • Vincenzo Palleschi
  • Azenio Salvetti
  • Elisabetta Tognoni
  • Mohamed A. Harith
Special Issue Paper

DOI: 10.1007/s00216-006-0363-z

Cite this article as:
Ismail, M.A., Cristoforetti, G., Legnaioli, S. et al. Anal Bioanal Chem (2006) 385: 316. doi:10.1007/s00216-006-0363-z

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).

Keywords

Laser-induced breakdown spectroscopyDouble-pulseAESUV–visibleMetals/Heavy Metals

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Marwa A. Ismail
    • 1
  • Gabriele Cristoforetti
    • 2
  • Stefano Legnaioli
    • 2
  • Lorenzo Pardini
    • 2
  • Vincenzo Palleschi
    • 2
  • Azenio Salvetti
    • 2
  • Elisabetta Tognoni
    • 2
  • Mohamed A. Harith
    • 1
  1. 1.National Institute of Laser Enhanced Sciences (NILES)Cairo UniversityGizaEgypt
  2. 2.Applied Laser Spectroscopy LaboratoryInstitute for Chemical-Physical Processes of CNRPisaItaly