Influence of particle location within plasma and focal volume on precision of single-particle laser-induced breakdown spectroscopy measurements

The effect of the location of particles within the plasma volume on the laser-induced breakdown spectroscopy signal for single-particle measurements is investigated. Three methods of collecting plasma emission are compared to determine the influence of plasma imaging on particle hit detection rates and signal precision. Imaging larger regions of the plasma volume improves particle detection rates. Spatial integration of the signal from the entire plasma volume tends to reduce uncertainty in the signal caused by variability in the location of particles within the plasma. Additionally, the use of spatially resolved measurements is found to maximize the particle detection efficiency. The use of spatially resolved measurements gives information about the location of particles within the plasma, which could be used to develop improved hit detection criteria, and to improve the precision of single-particle measurements.

[1]  D. Beddows,et al.  Single-pollen analysis by laser-induced breakdown spectroscopy and Raman microscopy. , 2003, Applied optics.

[2]  Philippe Adam,et al.  Detection of bacteria by time-resolved laser-induced breakdown spectroscopy. , 2003, Applied optics.

[3]  D. Hahn,et al.  Plasma volume considerations for analysis of gaseous and aerosol samples using laser-induced breakdown spectroscopy , 2002 .

[4]  A. C. Gaeris,et al.  Energy Absorption and Propagation in Laser-Created Sparks , 2004, Applied spectroscopy.

[5]  K. R. Hencken,et al.  Implementation of laser-induced breakdown spectroscopy as a continuous emissions monitor for toxic metals , 2000 .

[6]  David W Hahn,et al.  Assessment of the upper particle size limit for quantitative analysis of aerosols using laser-induced breakdown spectroscopy. , 2002, Analytical chemistry.

[7]  A. C. Gaeris,et al.  Laser propagation and energy absorption by an argon spark , 2003 .

[8]  D. Hahn,et al.  Effects of aerosols and laser cavity seeding on spectral and temporal stability of laser-induced plasmas: applications to LIBS , 2004 .

[9]  V. Bulatov,et al.  Study of Matrix Effects in Laser Plasma Spectroscopy by Combined Multifiber Spatial and Temporal Resolutions , 1998 .

[10]  David W. Hahn,et al.  Detection and Analysis of Aerosol Particles by Laser-Induced Breakdown Spectroscopy , 2000 .

[11]  David W. Hahn,et al.  On-line analysis of ambient air aerosols using laser-induced breakdown spectroscopy , 2001 .

[12]  V. Bulatov,et al.  Spectroscopic imaging of laser-induced plasma. , 1996, Analytical chemistry.

[13]  S. G. Buckley,et al.  Effects of focal volume and spatial inhomogeneity on uncertainty in single-aerosol laser-induced breakdown spectroscopy measurements , 2005 .

[14]  Allen L. Robinson,et al.  Ambient measurements of metal-containing PM2.5 in an urban environment using laser-induced breakdown spectroscopy , 2004 .

[15]  S. Buckley,et al.  Laser-Induced Breakdown Spectroscopy Detection and Classification of Biological Aerosols , 2003, Applied spectroscopy.

[16]  Alan C Samuels,et al.  Laser-induced breakdown spectroscopy of bacterial spores, molds, pollens, and protein: initial studies of discrimination potential. , 2003, Applied optics.

[17]  J. Winefordner,et al.  Radiation dynamics of post-breakdown laser induced plasma , 2004 .

[18]  David W. Hahn,et al.  Discrete Particle Detection and Metal Emissions Monitoring Using Laser-Induced Breakdown Spectroscopy , 1997 .

[19]  D. Hahn,et al.  Temporal analysis of laser-induced plasma properties as related to laser-induced breakdown spectroscopy , 2004 .