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Evaluation of airborne particulate matter and metals data in personal, indoor and outdoor environments using ED-XRF and ICP-MS and co-located duplicate samples

Citation

Niu, J and Rasmussen, PE and Wheeler, A and Williams, R and Chenier, M, Evaluation of airborne particulate matter and metals data in personal, indoor and outdoor environments using ED-XRF and ICP-MS and co-located duplicate samples, Atmospheric Environment, 44 pp. 235-245. ISSN 1352-2310 (2010) [Refereed Article]

Copyright Statement

Copyright 2009 Elsevier Ltd

DOI: doi:10.1016/j.atmosenv.2009.10.009

Abstract

Factors and sources affecting measurement uncertainty associated with monitoring metals in airborne particulate matter (PM) were investigated as part of the Windsor, Ontario Exposure Assessment Study (WOEAS). The assessmentwas made using co-located duplicate samples and a comparison of two analytical approaches: ED-XRF and ICP-MS. Sampling variabilitywas estimated using relative percent difference (RPD) of co-located duplicate samples. The comparison of ICP-MS and ED-XRF results yields very good correlations (R2  0.7) for elements present at concentrations that pass both ICP-MS and ED-XRF detection limits (e.g. Fe, Mn, Zn, Pb and Cu). PM concentration ranges (median, sample number) of 24-h indoor PM10 and personal PM10 filters, and outdoor PM2.5 filters were determined to be 2.2e40.7 (11.0, n 48) mgm3, 8.0e48.3 (11.9, n48) mgm3, and17.1e42.3 (21.6, n18) mgm3, respectively. The gravimetric analytical results reveal that the variations in PM mass measurements for same-day sampling are insignificant compared to temporal or spatial variations: 92%, 100% and 96% of indoor, outdoor and personal duplicate samples, respectively, pass the quality criteria (RPD  20%). Uncertainties associated with ED-XRF elemental measurements of S, Ca,Mn, Fe and Zn for 24-h filter samples are low: 78%e100% of the duplicate samples passed the quality criteria. In the case of 24-h filter samples using ICP-MS, more elements passed the quality criteria due to the lower detection limits. Thesewere: Li,Na, K, Ca, Si, Al, V, Fe,Mn, Co, Cu,Mo, Ag, Zn, Pb, As,Mg, Sb, Sn, Sr, Th, Ti, Tl, and U. Low air concentrations of metals (near or below instrumental detection limits) and/or inadvertent introduction of metal contamination are the main causes for excluding elements based on the pass/fail criteria. Uncertainty associated with elemental measurements must be assessed on an element-by-element basis.

Item Details

Item Type:Refereed Article
Keywords:particulate matter, metals, personal exposure
Research Division:Medical and Health Sciences
Research Group:Public Health and Health Services
Research Field:Environmental and Occupational Health and Safety
Objective Division:Health
Objective Group:Public Health (excl. Specific Population Health)
Objective Field:Environmental Health
Author:Wheeler, A (Dr Amanda Wheeler)
ID Code:101105
Year Published:2010
Web of Science® Times Cited:34
Deposited By:Menzies Institute for Medical Research
Deposited On:2015-06-10
Last Modified:2015-09-17
Downloads:0

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