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A multi-cyclone sampling array for the collection of size-segregated occupational aerosols.

Authors
Mischler-SE; Cauda-EG; Di Giuseppe-M; Ortiz-LA
Source
J Occup Environ Hyg 2013 Dec; 10(12):685-693
NIOSHTIC No.
20043407
Abstract
In this study a serial multi-cyclone sampling array capable of simultaneously sampling particles of multiple size fractions, from an occupational environment, for use in in vivo and in vitro toxicity studies and physical/chemical characterization, was developed and tested. This method is an improvement over current methods used to size-segregate occupational aerosols for characterization, due to its simplicity and its ability to collect sufficient masses of nano- and ultrafine sized particles for analysis. This method was evaluated in a chamber providing a uniform atmosphere of dust concentrations using crystalline silica particles. The multi-cyclone sampling array was used to segregate crystalline silica particles into four size fractions, from a chamber concentration of 10mg/m(3). The size distributions of the particles collected at each stage were confirmed, in the air, before and after each cyclone stage. Once collected, the particle size distribution of each size fraction was measured using light scattering techniques to further confirm the size distributions. As a final confirmation, scanning electron microscopy was used to collect images of each size fraction. The results presented here, using multiple measurement techniques, show that this multi-cyclone system was able to successfully collect distinct size-segregated particles at sufficient masses to perform toxicological evaluations and physical/chemical characterization.
Keywords
Sampling; Sampling-equipment; Particulate-sampling-methods; Particulates; Cyclone-air-samplers; Sampling-methods; Laboratory-testing; Aerosol-particles; Aerosol-sampling; Aerosols; Microscopy; Nanotechnology; Measurement-equipment; Testing-equipment; Light-emission; Scanning-techniques; Performance-capability; Silica-dusts; Author Keywords: crystalline silica; occupational aerosols; sampling method; size segregation
Contact
Steven E. Mischler, National Institute for Occupational Safety and Health, Office of Mine Safety and Health Research, 626 Cochrans Mill Road, Pittsburgh, PA 15236, USA
CODEN
JOEHA2
CAS No.
14808-60-7
Publication Date
20131201
Document Type
Journal Article
Email Address
smischler@cdc.gov
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
M122013
Issue of Publication
12
ISSN
1545-9624
NIOSH Division
OMSHR
Priority Area
Mining
Source Name
Journal of Occupational and Environmental Hygiene
State
PA
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