Short-term diffusive sampler for nitrogen dioxide monitoring in epidemiology

Journal Article · Fri Nov 01 04:00:00 EST 1991 · Journal of the Air and Waste Management Association; (United States)

DOI:https://doi.org/10.1080/10473289.1991.10466947· OSTI ID:5913374

Michaud, J P; Quackenboss, J ^[1]

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1. Univ. of Arizona, Tucson (United States)

An automated timed exposure diffusive sampler (TEDS) for sampling nitrogen dioxide (NO{sub 2}) was developed for use in epidemiological studies. The TEDS sequentially exposes four passive sampling devices (PSD) by microprocessor controlled valves while a pump and air flow guide prevent sampler starvation. Two TEDS units and two portable, real-time NO{sub 2} monitors were tested for accuracy, precision, sensitivity, and linearity of response. The accuracy of the TEDS was within 10 percent of the means of the measured values. The TEDS sensitivity was 20 to 30 ppb-hour for NO{sub 2}. Co-location of the TEDS with a chemiluminescent NO{sub x} monitor (EPA reference method) showed a similar responses to ambient NO{sub 2}. TEDS allows better time resolution than traditional diffusive samplers (i.e., Palmes tube) while sharing their ability to sample a variety of gases.

• OSTI ID: 5913374
• Journal Information: Journal of the Air and Waste Management Association; (United States), Journal Name: Journal of the Air and Waste Management Association; (United States) Vol. 41:11; ISSN JAWAE; ISSN 1047-3289
• Country of Publication: United States
• Language: English

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