Monitoraggio di aldeidi in ambiente urbano ed extraurbano nel periodo 1997-1999

The results of monitoring of aldehydes in the air from 1997 up to 1999 are showed: passive and active samplers have been employed. The values of formaldehyde and acetaldehyde in urban and non urban areas with very little or no traffic at all in the surroundings of Varese and Parabiago were compared. The results do not differ from the ones found in literature in similar situations: highest figures were noted, as expected, in urban areas. The comparison with meteorological data shows a relationship between measured values of formaldehyde and sun radiation.