Evaluation Of The SKC® DPM Cassette For Monitoring Diesel Particulate Matter In Coal Mines
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Evaluation Of The SKC® DPM Cassette For Monitoring Diesel Particulate Matter In Coal Mines

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    In a previous study, the e?cacy of commercial and prototype impactors for sampling diesel particulate matter (DPM) in coal mines was investigated. Laboratory and ?eld samples were collected on quartz-?ber ?lters and analyzed for organic and elemental carbon. Coal dust contributed a minimal amount of elemental carbon when commercial cascade impactors and prototype impactors, designed by the University of Minnesota (UMN) and the US Bureau of Mines (BOM), were used to collect submicrometer dust fractions. Other impactors were not as e?ective at excluding coal dust. The impactors evaluated in that study were either not commercially available or were multi-stage, expensive, and di?cult to use for personal measurements. A commercial version of the BOM impactor, called the DPM Cassette, was recently introduced by SKCs. Tests were conducted to evaluate the performance of the DPM Cassette for measuring diesel-source elemental carbon in the presence of coal dust. Bituminous coals from three mines in two di?erent coal provinces were examined. The dust particle diameters were small and the coal dust contained a high percentage of carbon, there by giving a worst-case condition for non-anthracite coal mines. Results for the DPM Cassette were essentially identical to those obtained by the BOM impactors in a previous study. At a respirable coal dust concentration of 5.46mg m3, which is 3.8 times the regulatory limit, the DPM Cassette collected only 34µg m3 of coal-source elemental carbon.
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