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Evaluation of a Portable Aerosol Collector and Spectrometer to measure particle concentration by composition and size
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6 03 2019
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Source: Aerosol Sci Technol. 53(6):675-687
[PDF-1.51 MB]
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Alternative Title:Aerosol Sci Technol
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Description:We evaluated a newly developed Portable Aerosol Collector and Spectrometer (PACS) in the laboratory. We developed an algorithm to estimate mass concentration by size and composition with a PACS. In laboratory experiments, we compared particle size distributions measured with the PACS to research instruments for multi-modal aerosols: two-mode generated by spark discharge, consisting of ultrafine (fresh Mn fume) and fine particles (aged Cu fume); and three-mode produced by adding coarse particles (Arizona road dust) to the two-mode. Near-real-time size distributions from the PACS compared favorably to those from a scanning mobility particle sizer and an aerodynamic particle sizer for the three-mode aerosol (number, | and |; surface area, |, |; mass, |, |), but less so for the two-mode aerosol (number, | and |; surface area, |, |; for mass, |, |). Elemental mass concentrations by size were similar to those measured with a nano micro-orifice uniform deposition impactor for coarse-mode particles, whereas agreement was considerably poorer for ultrafine- and fine-mode particles. The PACS has merit in estimating multi-metric concentrations by size and composition but requires further research to resolve discrepancies identified for two-mode aerosol.
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Pubmed ID:37736266
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Pubmed Central ID:PMC10512808
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Volume:53
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Issue:6
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