A new all‐season passive sampling system for monitoring NO2 in air

Efficacy of passive sampler collection for atmospheric NO2 isotopes under simulated environmental conditions

“…Previous investigations focusing on NO 2(g) concentration analysis have identified ambient temperature, relative humidity (referred to as RH for the rest of the paper), and wind speed as the key factors affecting the NO 2(g) uptake efficiency of passive samplers . For example, RH has been found to be the most important environmental factor influencing the effective sampling rate of passive NO 2(g) samplers due to the inefficiency of TEA as an absorbent at low relative humidities . However, it is currently unknown if changes in the NO 2(g) uptake efficiency induced by varying environmental conditions can cause fractionation of NO 2(g) isotopes during passive NO 2(g) collection.…”