A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A badge-type passive monitor was used to evaluate the effectiveness of four ozone trapping reagents for measuring O3 concentrations in the air. These were sodium nitrite (NaNO2), 3-methyl-2-benzothiazolinone acetone azine (MBTH), p-acetamidophenol (p-ATP), and indigo carmine. Experiments in an exposure chamber showed that only NaNO2 and MBTH monitors gave sensitive and linear responses over realistic ranges of O3 concentrations. When tested in ambient air, NaNO2 and MBTH monitors with a single-layer diffusion barrier overestimated O3 concentrations by a significant amount. This was largely canceled out in the NaNO2 monitor by using a multi-layered diffusion barrier to combat wind turbulence effects. However it had almost no effect on the MBTH monitor, and it was found that NO2 was a source of serious interference. We concluded that using the NaNO2 monitor with an effective diffusion barrier can measure O3 in ambient air with an accuracy of ±16%.
A badge-type passive monitor was used to evaluate the effectiveness of four ozone trapping reagents for measuring O3 concentrations in the air. These were sodium nitrite (NaNO2), 3-methyl-2-benzothiazolinone acetone azine (MBTH), p-acetamidophenol (p-ATP), and indigo carmine. Experiments in an exposure chamber showed that only NaNO2 and MBTH monitors gave sensitive and linear responses over realistic ranges of O3 concentrations. When tested in ambient air, NaNO2 and MBTH monitors with a single-layer diffusion barrier overestimated O3 concentrations by a significant amount. This was largely canceled out in the NaNO2 monitor by using a multi-layered diffusion barrier to combat wind turbulence effects. However it had almost no effect on the MBTH monitor, and it was found that NO2 was a source of serious interference. We concluded that using the NaNO2 monitor with an effective diffusion barrier can measure O3 in ambient air with an accuracy of ±16%.
Measurement of Ozone Concentrations in Ambient Air Using a Badge-Type Passive Monitor
Journal of the Air & Waste Management Association ; 47 ; 697-703
1997-06-01
7 pages
Article (Journal)
Electronic Resource
Unknown
A Re-Examination of Ambient Air Ozone Monitor Interferences
| Taylor & Francis Verlag | 2010
Water challenge badge : [Water, United Nations challenge badge]
Catalogue agriculture | 2013
Moderating the Influence of Meteorological Conditions on Ambient Ozone Concentrations
| Taylor & Francis Verlag | 1996