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Mining Publication: Comparing Measurements of Carbon in Diesel Exhaust Aerosols Using the Aethalometer, NIOSH Method 5040, and SMPS
Keywords: Aerosols Aethalometers Carbon Diesel exhaust NIOSH method 5040
Original creation date: April 2007
Authors: IP Ng, H Ma, DB Kittelson, AL Miller
Peer Reviewed Journal Article - April 2007
Download PDF Document (1.82 MB)
NIOSHTIC2 Number: 20033024
SAE Technical Paper Series 2007-01-0334, 2007 Apr :1-10
Combustion aerosols consist mainly of elemental and organic carbon (EC and OC). Since EC strongly absorbs light and thus affects atmospheric visibility and radiation balance, there is great interest in its measurement. To this end, the National Institute for Occupational Safety and Health (NIOSH) published a standard method to determine the mass of EC and OC on filter samples. Another common method of measuring carbon in aerosols is the aethalometer, which uses light extinction to measure "black carbon" or BC, which is considered to approximate EC. A third method sometimes used for estimating carbon in submicron combustion aerosols, is to measure particle size distributions using a scanning mobility particle sizer (SMPS) and calculate mass using the assumptions that the particles are spherical, carbonaceous and of known density. With an eye toward evaluating the use of these methods for measuring carbon in freshly emitted diesel aerosols, the objective of this paper is to compare the results among these methods and to investigate the role of OC when measuring the mass concentration of elemental carbon (or black carbon) in aerosols emitted by a medium-duty Diesel engine. Results indicate that the aethalometer response correlates well with the data from filter samples (R2 = 0.99), with a very slight positive interference at high levels of OC.
Image of publication Comparing Measurements of Carbon in Diesel Exhaust Aerosols Using the Aethalometer, NIOSH Method 5040, and SMPSPeer Reviewed Journal Article - April 2007
Download PDF Document (1.82 MB)
NIOSHTIC2 Number: 20033024
SAE Technical Paper Series 2007-01-0334, 2007 Apr :1-10
See Also
Characterization of Nanometer and Ultrafine Diesel Aerosols in the Underground Mining Environment
Control Technologies and Strategies for Reducing Exposure of Underground Miners to Diesel Emissions
Diesel Aerosols and Gases in Underground Mines: Guide to Exposure Assessment and Control
Effects of Diesel Exhaust Aftertreatment Devices on Concentrations and Size Distribution of Aerosols in Underground Mine Air
Effects of Sintered Metal Diesel Particulate Filter System on Diesel Aerosols and Nitric Oxides in Mine Air
Evaluation of a Wearable Monitor for Measuring Real-time Diesel Particulate Matter Concentrations in Several Underground Mines
Examination of Diesel Aftertreatment Systems at NIOSH Lake Lynn Laboratory
Real-time Diesel Particulate Monitor for Underground Mines
Real-Time Estimation of Elemental Carbon Emitted from a Diesel Engine
Toward developing a new occupational exposure metric approach for characterization of diesel aerosols
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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