Abstract

Laser-induced breakdown spectroscopy (LIBS) is ideally suited to function as a real-time, in situ monitor characterized by speed and experimental simplicity, and is sensitive enough for measuring aerosol elemental composition as well as overall mass concentrations. Ensemble averaging has historically been used to overcome the extensive laser shot-to-shot spectral fluctuations, thereby improving sensitivity of the LIBS technique. Ensemble averaging, however, reaches a natural limit when low to very low aerosol concentrations comprise the analyte species of interest. For the unique problem of aerosol analysis, the point-sampling nature of the LIBS technique plays an important role in LIBS data processing, and conditional spectral analysis may be used as defined by the presence or absence of discrete particles in a corresponding plasma volume. Conditional data analysis algorithms applied to individual spectra can improve signal-to noise ratios as well as enable the study of single-shot LIBS spectra corresponding to individual aerosol particles. Single-shot LIBS analyses of aerosols raises new questions regarding shot-to-shot fluctuations and data precision, as well as issues involving the fundamental interaction between the laser-induced plasma and aerosol particles. These issues are explored in the context of quantitative LIBS-based analysis of single aerosol particles.

© 2002 Optical Society of America

PDF Article
More Like This
Laser-Induced Breakdown Spectroscopy (LIBS) for Aerosol Analysis

David W. Hahn, Prasoon K. Diwakar, and Philip B. Jackson
CMQ5 Conference on Lasers and Electro-Optics (CLEO) 2008

Resonance-enhanced LIBS

K.M. Lo, S.L. Lui, X.Y. Pu, and N.H. Cheung
WB2 Laser Induced Plasma Spectroscopy and Applications (LIBS) 2002

Study of the influence of Er:YAG and Nd:YAG wavelengths upon LIBS measurements under air or helium atmosphere

V. Detalle, M. Sabsabi, L. St-Onge, A. Hamel, and R. Héon
ThD3 Laser Induced Plasma Spectroscopy and Applications (LIBS) 2002

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription