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Evaluation of laser-induced breakdown spectroscopy (LIBS) for measurement of silica on filter samples of coal dust.

Authors
Stipe-CB; Miller-AL; Brown-J; Guevara-E; Cauda-E
Source
Appl Spectrosc 2012 Nov; 66(11):1286-1293
NIOSHTIC No.
20041847
Abstract
Airborne silica dust (quartz) is common in coal mines and represents a respiratory hazard that can lead to silicosis, a potentially fatal lung disease. With an eye toward developing a portable monitoring device for rapid analysis of silica dust, laser-induced breakdown spectroscopy (LIBS) was used to quantify quartz in coal dust samples collected on filter media. Pure silica [Min-U-Sil(TM) 5], Georgia kaolin, and Pittsburgh-4 and Illinois-6 coal dusts were deposited separately and at multiple mass loadings onto 37-mm polyvinylchloride (PVC) filters. LIBS-generated silicon emission was monitored at 288.16 nm, and non-silica contributions to that signal from kaolinite were removed by simultaneously detecting aluminum. Measurements of the four samples were used to calculate limits of detection (LOD) for silicon and aluminum of approximately 0.08 g/cm2 and 0.05 g/cm2, respectively (corresponding to 0.16 g/cm2 and 0.20 g/cm 2 for silica and kaolinite, respectively). Relative errors of prediction are around 10%. Results demonstrate that LIBS can dependably quantify silica on filter samples of coal dust and confirm that accurate quantification can be achieved for very lightly loaded samples, which supports the potential application of LIBS for rapid, in-field monitoring.
Keywords
Silica-dusts; Quartz-dust; Airborne-dusts; Airborne-particles; Coal-dust; Spectrographic-analysis; Spectroscopes; Measurement-equipment; Respiratory-irritants; Monitoring-systems; Monitors; Sampling; Sampling-equipment; Silicon-compounds; Aluminum-compounds; Author Keywords: Laser-induced breakdown spectroscopy; LIBS; Coal dust; Silicon; Silica; Silicosis; Filter; Aerosols
Contact
Christopher B. Stipe, Department of Mechanical Engineering, Seattle University, Seattle, WA 98122 USA
CODEN
APSPA4
CAS No.
7631-86-9; 14808-60-7
Publication Date
20121101
Document Type
Journal Article
Email Address
stipec@seattleu.edu
Fiscal Year
2013
NTIS Accession No.
NTIS Price
Identifying No.
B20121218D
Issue of Publication
11
ISSN
0003-7028
NIOSH Division
OMSHR
Priority Area
Mining
Source Name
Applied Spectroscopy
State
WA; PA
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