title: [Particulate matter measurements PM2.5 and PM10 in Rome: comparison indoor/outdoor].
abstract: The concentration of airborne particulate matter (PM2.5 and PM10) was assessed over 12 months (1999-2000) both outdoor and indoor (workplaces and homes without major PM sources) through a manual gravimetric method. Mean concentration values outdoors were moderately lower than indoor concentrations in summer, but higher in winter. The correlations between outdoor and indoor values are statistically significant, especially for PM2.5 in winter. The position of indoor sites with respect to street level was immaterial as far as mean values is concerned, whilst maximum values presented some differences accordingly. Day-to-day variability was higher outside than inside, especially in winter. The PM2.5/PM10 ratio was higher indoors, probably owing to the higher sedimentation speed of the coarse fraction.
authors.affiliation: Laboratorio di Igiene Ambientale, Istituto Superiore di Sanità, Roma. cattanig@iss.it
authors.forename: Giorgio
authors.initials: G
authors.lastname: Cattani
authors.forename: Maria Carmela
authors.initials: MC
authors.lastname: Cusano
authors.forename: Marco
authors.initials: M
authors.lastname: Inglessis
authors.forename: Gaetano
authors.initials: G
authors.lastname: Settimo
authors.forename: Giordano
authors.initials: G
authors.lastname: Stacchini
authors.forename: Giovanni
authors.initials: G
authors.lastname: Ziemacki
authors.forename: Achille
authors.initials: A
authors.lastname: Marconi
mesh_terms: D000397:Air Pollution / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis; D010316:Particle Size; D012384:Rome