%0 Journal Article
%A Jorge Jimenez
%A Candis S Claiborn
%A Timothy Larson
%A Thomas W Kirchstetter
%A Lara A Gundel
%B Journal of Air and Waste Management Association
%D 2007
%G eng
%N 7
%P 868–873
%T Filter loading corrections for real-time aethalometer measurements of fresh diesel soot. (2007)
%V 57
%1 <p>3</p>
%X <p>In this study, a correction was developed for the aethalometer to measure real-time black carbon (BC) concentrations in an environment dominated by fresh diesel soot. The relationship between the actual mass-specific absorption coefficient for BC and the BC-dependent attenuation coefficients was determined from experiments conducted in a diesel exposure chamber that provided constant concentrations of fine particulate matter (PM; PM(2.5); PM &lt; 2.5 microm in aerodynamic diameter) from diesel exhaust. The aethalometer reported BC concentrations decreasing with time from 48.1 to 31.5 microg m(-3) when exposed to constant PM(2.5) concentrations of 55 +/- 1 microg m(-3) and b(scat) = 95 +/- 3 Mm(-1) from diesel exhaust. This apparent decrease in reported light-absorbing PM concentration was used to derive a correction K(ATN) for loading of strong light-absorbing particles onto or into the aethalometer filter tape, which was a function of attenuation of light at 880 nm by the embedded particles.</p>