Publikasjoner

Measurements of Oxidative Potential of Particulate Matter at Belgrade Tunnel; Comparison of BPEAnit, DTT and DCFH Assay

Jovanovic, Maja; Savic, Jasmina; Salimi, Farhad; Stevanovic, Svetlana; Brown, Reece A.; Jovasevic-Stojanovic, Milena; Manojlovic, Dragan; Bartonova, Alena; Bottle, Steven; Ristovski, Zoran

To estimate the oxidative potential (OP) of particulate matter (PM), two commonly used cell-free, molecular probes were applied: dithiothreitol (DTT) and dichloro-dihydro-fluorescein diacetate (DCFH-DA), and their performance was compared with 9,10-bis (phenylethynyl) anthracene-nitroxide (BPEAnit). To the best of our knowledge, this is the first study in which the performance of the DTT and DCFH has been compared with the BPEAnit probe. The average concentrations of PM, organic carbon (OC) and elemental carbon (EC) for fine (PM2.5) and coarse (PM10) particles were determined. The results were 44.8 ± 13.7, 9.8 ± 5.1 and 9.3 ± 4.8 µg·m−3 for PM2.5 and 75.5 ± 25.1, 16.3 ± 8.7 and 11.8 ± 5.3 µg·m−3 for PM10, respectively, for PM, OC and EC. The water-soluble organic carbon (WSOC) fraction accounted for 42 ± 14% and 28 ± 9% of organic carbon in PM2.5 and PM10, respectively. The average volume normalized OP values for the three assays depended on both the sampling periods and the PM fractions. The OPBPEAnit had its peak at 2 p.m.; in the afternoon, it was three times higher compared to the morning and late afternoon values. The DCFH and BPEAnit results were correlated (r = 0.64), while there was no good agreement between the BPEAnit and the DTT (r = 0.14). The total organic content of PM does not necessarily represent oxidative capacity and it shows varying correlation with the OP. With respect to the two PM fractions studied, the OP was mostly associated with smaller particles.

MDPI

Measurements of ozone profiles in daylight with the ALOMAR Ozone DIAL system: development and first results.

Hansen, G.; Edvardsen, K.; Hoppe, U.P. , Gausa, M.; Rees, D.

Measurements of particles in urban areas around the world. A comparison of levels and causes. NILU F

Sivertsen, B.

Measurements of particulate matter in EMEP. EMEP/CCC

Lazaridis, M.

Measurements of particulate matter inside the EMEP framework during 2004. Report series in aerosol science, No. 92

Lazaridis, M.; Aleksandropoulou, V.; Yttri, K.E.; Tørseth, K.

Measurements of particulate matter: Status report 2002. EMEP/CCC

Edited by Michael Kahnert.

Measurements of particulate matter: Status report 2005. EMEP/CCC

Yttri, K.E. (eds.)

Measurements of particulate matter. Status report 2003. EMEP/CCC

Kahnert, M. (eds.)

Measurements of PM1, PM2.5 and PM10 in air at Nordic background stations using low-cost equipment. IVL Report, B1791

Ferm, M.; Areskoug, H.; Makkonen, U.; Wåhlin, P.; Yttri, K.E.

Measurements of sucralose in the Swedish screening program 2007. Part I: Sucralose in surface waters and STP samples. IVL Report, B1769

Brorström-Lundén, E.; Svenson, A.; Viktor, T.; Woldegiorgis, A.; Remberger, M.; Kaj, L.; Dye, C.; Bjerke, A.; Schlabach, M.

Measurements of total ozone at Ny-Ålesund since 1991. Poster presentation. NILU F

Høiskar, B.A.K.; Dahlback, A.; Tørnkvist, K.K.; Sinnhuber, B.M.

Measurements of Ultrafine and Fine Aerosol Particles over Russia: Large-scale Airborne Campaigns.

Arshinov, M.Yu.; Paris J.-D.; Stohl, A.; Belan, B.D.; Ciais P.; Nedelec, P.