3.3. Nitroaromatic compound concentrations
Table 1 presents the median and mean concentrations of the
nitroaromatic compounds for PM10 samples collected in SPA,whereas their time series are displayed in Figs. 1 and 2, together with those of OC and the anhydrosugars. Relatively high concentrations of 4NC and the sum of MNCs were determined with median concentrations estimated at 13.6 ng m3 and 14.1 ng m3 in 2012 and at 32 ng m3 and 20 ng m3 in 2013. All together the nitroaromatic compounds contributed to 0.28% and 0.35% of the OC mass. These results support that the PM10 was more impacted by BB in 2013 than in 2012.