Application of passive diffusion tubes to short-term indoor and personal exposure measurement of NO

Abstract

Palmes-type passive diffusion tubes were shown to be as accurate in measurement of indoor NO 2 during short-term (2 and 3-day) exposures as during 1-week exposures. The statistical limit of detection for cumulative NO 2 in 2 and 3-day exposure was 150 (nL/L).h. Mean coefficient of variation for duplicate 2 and 3-day exposures was < 13 %. A pilot study measuring personal, indoor (living room) and outdoor (just outside the home) NO 2 over 3 days for 8 volunteers demonstrates the feasibility and reliability of using passive diffusion tubes for short-term personal exposure measurements, and confirms the necessity of obtaining actual exposure profiles for a specific sub-population.3

Smartphone-Based Color Evaluation of Passive Samplers for Gases: A Review

“…Nonetheless, useful and frequent applications can be found in large-scale mapping, long-term personal exposure estimates, and identification of air pollution hot spots [14][15][16][17][18][19]. However, many examples of passive sampling also exist for short-term measurements of time-weighted exposure to gaseous contaminants applied to personal monitoring [20][21][22].…”