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Atmospheric benzene and carbonyls were studied in San Nicolas de los Garza, Nuevo Leon, during 2011 and 2012. The relative abundance for measured VOCs was the following: formaldehyde (9.06 µg m −3 ) > acetaldehyde (8.06 µg m −3 ) > benzene (0.65 µg m −3 ). All measured VOCs had a clear seasonal trend with higher values of concentration during summer. Benzene and formaldehyde had a marked diurnal trend with the highest levels during morning, whereas acetaldehyde did not show a clear diurnaldoi:10.3390/atmos8100196 fatcat:f42hpe64znfpvoeq35fs6gyosy