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Performance Characteristics of PM2.5 Samplers in the Presence of Agricultural Dusts

Amber R. Pargmann, Calvin B. Parnell, Jr. and Bryan W. Shaw


ABSTRACT

Tests in a controlled laboratory environment were performed on three PM2.5 samplers: a FRM sampler with Wells Impactor Ninety-Six, a FRM sampler with Sharp-Cut Cyclone, and a High-Volume PM2.5 Sampler. Three dusts were used for sampling: alumina, corn starch, and wheat flour. Ten replications were performed for each sampler in each dust for a total of ninety replications. Concentration measurements for the test samplers were compared to the “true” PM2.5 concentrations, determined by multiplying the fraction less than 10 µm from the Coulter Counter PSD times the TSP concentration. The results showed the percent error of the PM2.5 samplers increased with the MMD of the dust sampled. The hypothesis was that the PM2.5 samplers used to monitor PM2.5 concentrations in the ambient air will not accurately perform in an agricultural environment. It was concluded that the use of these PM2.5 samplers would result in unfair regulation of the agricultural industry.





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Document last modified May 20, 2002