naa a22 4500 510751660 CHVBK 20180411083106.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s11270-013-1630-1 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1630-1 Composition and Integrity of PAHs, Nitro-PAHs, Hopanes, and Steranes in Diesel Exhaust Particulate Matter [Elektronische Daten] [Lei Huang, Stanislav Bohac, Sergei Chernyak, Stuart Batterman] Diesel exhaust particulate matter contains many semivolatile organic compounds (SVOCs) of environmental and health significance. This study investigates the composition, emission rates, and measurement integrity of 25 SVOCs, including polycyclic aromatic hydrocarbons (PAHs), nitro-PAHs (NPAHs), and diesel biomarkers hopanes and steranes. Diesel engine particulate matter (PM), generated using an engine test bench, three engine conditions, and ultralow sulfur diesel (ULSD), was collected on borosilicate glass fiber filters. Under high engine load, the PM emission rate was 0.102g/kWh, and emission rates of ΣPAHs (10 compounds), ΣNPAHs (6 compounds), Σhopanes (2 compounds), and Σsteranes (2 compounds) were 2.52, 0.351, 0.02-2 and 1μg/kWh, respectively. Storage losses were evaluated for three cases: conditioning filters in clean air at 25°C and 33% relative humidity (RH) for 24h, storing filter samples (without extraction) wrapped in aluminum foil at 4°C for up to 1month, and storing filter extracts in glass vials capped with Teflon crimp seals at 4°C for up to 6months. After conditioning filters for 24h, 30% of the more volatile PAHs were lost, but lower volatility NPAHs, hopanes and steranes showed negligible changes. Storing wrapped filters and extracts at 4°C for up to 1month did not lead to significant losses, but storing extracts for 5months led to significant losses of PAHs and NPAHs; hopanes and steranes demonstrated greater integrity. These results suggest that even relatively brief filter conditioning periods, needed for gravimetric measurements of PM mass, and extended storage of filter extracts, can lead to underestimates of SVOC concentrations. Thus, SVOC sampling and analysis protocols should utilize stringent criteria and performance checks to identify and limit possible biases occurring during filter and extract processing. Springer Science+Business Media Dordrecht, 2013 Polycyclic aromatic hydrocarbons (PAHs) nationallicence Nitro-PAHs (NPAHs) nationallicence Diesel biomarkers nationallicence Filter conditioning nationallicence Sample storage nationallicence Huang Lei Department of Environmental Health Sciences, School of Public Health, University of Michigan, 48109, Ann Arbor, MI, USA aut Bohac Stanislav Department of Mechanical Engineering, University of Michigan, 48109, Ann Arbor, MI, USA aut Chernyak Sergei Department of Environmental Health Sciences, School of Public Health, University of Michigan, 48109, Ann Arbor, MI, USA aut Batterman Stuart Department of Environmental Health Sciences, School of Public Health, University of Michigan, 48109, Ann Arbor, MI, USA aut Water, Air, & Soil Pollution Springer Netherlands 224/8(2013-08-01), 1-14 0049-6979 224:8<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1630-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1630-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Huang Lei Department of Environmental Health Sciences, School of Public Health, University of Michigan, 48109, Ann Arbor, MI, USA aut NATIONALLICENCE 700 1- Bohac Stanislav Department of Mechanical Engineering, University of Michigan, 48109, Ann Arbor, MI, USA aut NATIONALLICENCE 700 1- Chernyak Sergei Department of Environmental Health Sciences, School of Public Health, University of Michigan, 48109, Ann Arbor, MI, USA aut NATIONALLICENCE 700 1- Batterman Stuart Department of Environmental Health Sciences, School of Public Health, University of Michigan, 48109, Ann Arbor, MI, USA aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/8(2013-08-01), 1-14 0049-6979 224:8<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer