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Development of a unique multi-contaminant air sampling device for a childhood asthma cohort in an agricultural environment.

Authors
Armstrong-JL; Fitzpatrick-CF; Loftus-CT; Yost-MG; Tchong-French-M; Karr-CJ
Source
Environ Sci Process Impacts 2013 Sep; 15(9):1760-1767
NIOSHTIC No.
20043944
Abstract
This research describes the design, deployment, performance, and acceptability of a novel outdoor active air sampler to provide simultaneous measurements of multiple contaminants at timed intervals for the Aggravating Factors of Asthma in Rural Environment (AFARE) study-a longitudinal cohort of 50 children in Yakima Valley, Washington. The sampler was constructed of multiple sampling media connected to individual critical orifices and a rotary vane vacuum pump. It was connected to a timed control valve system to collect 24 hours samples every six days over 18 months. We describe a spatially representative approach with both quantitative and qualitative location criteria to deploy a network of 14 devices at participant residences in a rural region (20 60 km). Overall the sampler performed well, as the concurrent mean sample flow rates were within or above the ranges of recommended sampling rates for each exposure metric of interest. Acceptability was high among the study population of Hispanic farmworker participant households. The sampler design may prove useful for future urban and rural community-based studies with aims at collecting multiple contaminant data during specific time periods.
Keywords
Air-samplers; Outdoors; Equipment-design; Equipment-reliability; Air-sampling-equipment; Measurement-equipment; Children; Bronchial-asthma; Airborne-particles; Air-contamination; Environmental-contamination; Environmental-exposure; Agricultural-industry; Agricultural-workers; Agriculture; Vacuum-equipment; Samplers
Contact
Jenna L. Armstrong, Department of Environmental and Occupational Health Sciences, University of Washington School of Public Health, Health Sciences Building, 1959 NE Pacific Street, Box 357234, Seattle, WA 98195, USA
Publication Date
20130901
Document Type
Journal Article
Email Address
jennaa@uw.edu
Funding Type
Cooperative Agreement
Fiscal Year
2013
NTIS Accession No.
NTIS Price
Identifying No.
Cooperative-Agreement-Number-U50-OH-007544
Issue of Publication
9
ISSN
2050-7887
Source Name
Environmental Science: Processes & Impacts
State
WA
Performing Organization
University of Washington
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