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Use of TEOM monitors for continuous long-term sampling of ambient particles for analysis of constituents and biological effects
Occupational and Environmental Medicine Center and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden.
National Institute of Occupational Health, Oslo, Norway.ORCID iD: 0000-0003-4928-617X
Occupational and Environmental Medicine Center and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden.
Occupational and Environmental Medicine, Department of Clinical and Experimental Medicine, Faculty of Medicine and Health Sciences, Linköping University, Linköping, Sweden.
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2019 (English)In: Air quality, atmosphere and health, ISSN 1873-9318, E-ISSN 1873-9326, Vol. 12, no 2, p. 161-171Article in journal (Refereed) Published
Abstract [en]

Many countries have implemented exposure limits for the concentration of ambient particular matter and do therefore have to monitor their concentration. This could be performed with TEOM monitors (Tapered Element Oscillating Microbalance-monitors) that contain a filter on which particles are collected. These filters are regularly exchanged for new ones. The aim of this study was to test the feasibility of collecting used filters from monitors at different locations and establishing a method to extract particles and then study them with respect to their ability to generate oxidants, their endotoxin content, and ability to activate inflammatory cells. Filters from nine geographically spread locations in Sweden were collected during a 21-month period by local technicians who then sent them to the laboratory where they were extracted and analyzed. The procedure to let local technicians perform the filter exchange and send used TEOM filters to the laboratory worked well. A method was established in which pyrogen-free water was used to extract particles that then were aliquoted and stored for later analysis. Particulate matter (PM 10 ) from different locations showed both a considerable seasonal and spatial-dependent difference with respect to oxidative potential (oxidize glutathione), endotoxin content, and ability to activate blood monocytes to release interleukin-1β. This study shows that, instead of discarding TEOM filters, they can be collected and extracted so that particles that have been sampled in a standardized way could be analyzed with respect to variables that reflect their toxicity. This could be done at a low cost. In combination with information about the ambient particle concentration, such information could be helpful in the evaluation of differences in the risk of breathing air at various locations.

Place, publisher, year, edition, pages
Springer, 2019. Vol. 12, no 2, p. 161-171
Keywords [en]
Air pollution, Ambient particles, Endotoxin, Seasonal variation, Surface reactivity, TEOM monitor, atmospheric pollution, blood, concentration (composition), detection method, particle size, particulate matter, sampling, toxicity, toxin, Sweden
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:oru:diva-73681DOI: 10.1007/s11869-018-0638-5ISI: 000458121600004Scopus ID: 2-s2.0-85056389584OAI: oai:DiVA.org:oru-73681DiVA, id: diva2:1304517
Available from: 2019-04-12 Created: 2019-04-12 Last updated: 2019-04-12Bibliographically approved

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