期刊
AEROSOL SCIENCE AND TECHNOLOGY
卷 50, 期 12, 页码 1352-1365出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/02786826.2016.1232859
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类别
资金
- NIOSH [R01 OH010533]
- NIOSH
- ALLCDC [5R01OH010533-03, 825925] Funding Source: Federal RePORTER
We compared the performance of a low-cost (similar to$ 500), compact optical particle counter (OPC, OPCN-2, Alphasense) to another OPC (PAS-1.108, Grimm Technologies) and reference instruments. We measured the detection efficiency of the OPCs by size from 0.5 to 5 mu m for monodispersed, polystyrene latex (PSL) spheres. We then compared number and mass concentrations measured with the OPCs to those measured with reference instruments for three aerosols: salt, welding fume, and Arizona road dust. The OPC-N2 detection efficiency was similar to the PAS-1.108 for particles larger than 0.8 mm (minimum of 79% at 1 mu m and maximum of 101% at 3 mu m). For 0.5-mu m particles, the detection efficiency of the OPC-N2 was underestimated at 78%, whereas PAS-1.108 overestimated concentrations by 183%. The mass concentrations from the OPCs were linear (r >= 0.97) with those from the reference instruments for all aerosols, although the slope and intercept were different. The mass concentrations were overestimated for dust (OPC-N2, slope = 1.6; PAS-1.108, slope = 2.7) and underestimated for welding fume (OPC-N2, slope = 0.05; PAS-1.108, slope = 0.4). The coefficient of variation (CV, precision) for OPC-N2 for all experiments was between 4.2% and 16%. These findings suggest that, given site-specific calibrations, the OPC-N2 can provide number and mass concentrations similar to the PAS-1.108 for particles larger than 1 mu m.
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