title: Pulmonary deposition of particles in welders: on-site measurements.
abstract: The authors used integrating nephelometers to demonstrate the feasibility of measuring particulate matter with a diameter of 2.5 microm (PM2.5) in the breathing zone and PM2.5 mass deposition in the airways of 6 welders at their place of work. The authors also measured stationary PM2.5 measurements. The between-subject variation in deposition of PM2.5 mass was approximately 1/3 of the within-subject variation. Smokers had a significantly higher total respiratory system deposition than nonsmokers. The PM2.5 deposition for a given amount of exhaled air was dependent on PM2.5 concentration levels. The estimated total amount of PM2.5 deposited in the respiratory system of the subjects was approximately 1 mg/day.
authors.affiliation: Department of Pulmonary Medicine, Bispebjerg Hospital, Copenhagen, Denmark.
authors.forename: A
authors.initials: A
authors.lastname: Frøsig
authors.forename: H
authors.initials: H
authors.lastname: Bendixen
authors.forename: D
authors.initials: D
authors.lastname: Sherson
mesh_terms: D000328:Adult; D000395:Air Pollutants, Occupational / Q000032:analysis / Q000378:metabolism; D006801:Humans; D008168:Lung / Q000378:metabolism* / Q000502:physiology; D008297:Male; D008875:Middle Aged; D008962:Models, Theoretical; D009391:Nephelometry and Turbidimetry; D010316:Particle Size; D012129:Respiratory Function Tests; D012907:Smoking / Q000009:adverse effects; D013997:Time Factors; D014896:Welding
chemical_list: D000395:Air Pollutants, Occupational