Detection and Analysis of Aerosol Particles by Laser-Induced Breakdown Spectroscopy

Hahn, David W.; Lunden, Melissa M.

doi:10.1080/027868200410831

Cited by 205 publications

(125 citation statements)

References 26 publications

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“…More specifically, the spectrum of sodium (588. 6 [nm]) was measured individually 400 times, and the frequency distribution of the intensity of individual spectra was measured. Figure 7 shows the normalized histogram obtained from test results.…”

Section: Testing and Evaluation Based On Statistical Methodsmentioning

confidence: 99%

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Particle Element and Size Simultaneous Measurement Using LIBS

2007

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Section: Testing and Evaluation Based On Statistical Methodsmentioning

confidence: 99%

“…In practice however, particles are not distributed in a uniform manner. For this reason, statistical consideration must be given to the probability at which laser light hits particles (6) . For example, consider the conditions mentioned above, i.e.…”

Section: Statistical Considerationsmentioning

confidence: 99%

Particle Element and Size Simultaneous Measurement Using LIBS

2007

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“…Relatively low laser pulse energy (9 mJ) was therefore used to generate the plasma and vaporize the microbial particle. For comparison, e.g., Hahn and Lunden (2000) used 400 mJ and Hybl et al (2006) 50 mJ pulse energy for aerosol particle analysis by LIBS. Lasers with low pulse energy are typically more compact and applicable in field use.…”

Section: Na Ca and K Concentrations In Microbial Particlesmentioning

confidence: 99%

Identification of single microbial particles using electro-dynamic balance assisted laser-induced breakdown and fluorescence spectroscopy

Saari

Järvinen

Reponen

et al. 2015

Aerosol Science and Technology

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Online characterization of fungal and bacterial spores is important in various applications due to their health and climatic relevance. The aim of this study was to demonstrate the capability of the combination of electro-dynamic balance assisted laser-induced breakdown spectroscopy (LIBS) and laser-induced fluorescence (LIF) techniques for the online detection of single fungal spores (Aspergillus versicolor and Penicillium brevicompactum) and bacteria (Bacillus aureus). The method enabled sensitive and repeatable LIBS analysis of common elemental components (Ca, Na, and K) from single microbial particles for the first time. Significant differences in the concentrations of these elements were observed between the species, e.g., bacterial spores had over three orders of magnitude higher Ca concentration (2 £ 10 ¡12 g/particle) compared to fungal spores (3-5 £ 10 ¡16 g/particle). The LIF analysis has previously been used to distinguish bioaerosols from other aerosols due to their fluorescence ability. This study showed that combination of LIF and LIBS analysis is a promising tool for identification of different bioaerosol particle types. EDITORPaul J. Ziemann

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“…Recently this approach has been expanded to the measurement of the two-dimensional angular optical scattering of single aerosol particles (Kaye et al 1997;Holler et al 1998), laser-induced breakdown spectroscopy of single particles (Hahn and Lunden 2000), laser-ablation mass spectrometry of single particles (Murphy and Thomson 1995;Reilly et al 1997), and the intrinsic laser-induced fluorescence (LIF) of single particles , all of which may be used for additional characterization.…”

Section: Introductionmentioning

confidence: 99%

Single-Particle Fluorescence Spectrometer for Ambient Aerosols

Pan

Hartings

Pinnick

et al. 2003

Aerosol Science and Technology

109

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A fluorescence particle spectrometer (FPS) for real-time measurement of the fluorescence spectra of aerosol particles in the size range 1-10 µm diameter is reported. The prototype FPS has a sufficiently high sample rate (from 5 to 28 l/min for 3.5 µm to 11 µm diameter particles) to measure aerosol within buildings at practical rates (from 1 up to 600 particle fluorescence spectra per minute). Previously reported bioaerosol prototype detectors for measurement of single particle spectra (Pan et al., Opt. Lett., 24, 116-118 (1999); Hill et al., Field Anal. Chem. Tech., 3, 221-239 (1999)) were unable to sample the ambient environment; air containing particles had to be forced under pressure into a sample cell. In addition, sample rates were so small (less than 0.01 l/min) as to be impractical for most applications. The present design overcomes these deficiencies by the use of an airtight cell that highly concentrates micrometer-sized particles. A virtual impactor first concentrates aerosol particles, which are then drawn under negative pressure through an aerodynamic focusing nozzle in the inlet of the instrument, through the sample region, providing further concentration. The rate of particle spectra measured by the FPS increases significantly when the particle inlet is within a few meters of some common sources of indoor biological particles, e.g., a person coughing, sneezing, or rubbing his skin, or the presence of a dog. The spectra obtained have a variety of spectral shapes. The FPS may be useful in a variety of areas, e.g., in studying and monitoring airborne particles that cause diseases or allergies.

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Detection and Analysis of Aerosol Particles by Laser-Induced Breakdown Spectroscopy

Cited by 205 publications

References 26 publications

Particle Element and Size Simultaneous Measurement Using LIBS

Particle Element and Size Simultaneous Measurement Using LIBS

Identification of single microbial particles using electro-dynamic balance assisted laser-induced breakdown and fluorescence spectroscopy

Single-Particle Fluorescence Spectrometer for Ambient Aerosols

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