Evaluation of short-term Ogawa passive, photolytic, and federal reference method sampling devices for nitrogen oxides in El Paso and Houston, Texas

摘要: Passive Sampling Devices (PSDs) have been successfully used by government and academic agencies to monitor common ambient air pollutants such as ozone nitrogen dioxide (NO2). Most PSD studies involved long-term (e.g. bi-weekly or monthly) sampling. But the Ozone Network of Dallas (POND) 1998 1999 showed that high quality 24-hour 12-hour data using Ogawa could be collected for concentrations. This paper presents an evaluation short-term passive sampling results oxides (NOx) in El Paso Houston, Texas, PSD. The NOx PSDs were compared both Federal Reference Method (FRM) monitors a photolytic converter, with converter designed report closer concentrations “true” more effectively limiting interferences other species. Overall, good agreement was noted all three types cities, supporting potential use lower cost large multi-site episodic NOx/NO2/NO saturation screening studies. conducted during two separate six week periods cooler winter months so additional testing different seasons is recommended.