Abstract
Employing a wind tunnel, the effect of wind velocity was examined on the simplified measuring methods of nitrogen dioxide (NO2) concentration in the ambient atmosphere using a filter paper treated with triethanalamine. The methods used were triethanolaminetreated filter paper method, Amaya's simplified method, and TGS filter paper method.
Measured values of the simplified methods varied on a large scale against the wind velocity and were fitted as a power function of the wind velocity. Furthermore, it became evident that the valus also depended on the wind direction. The above mentioned simplified methods of atmospheric NO2 monitoring were unsuitable because the wind velocity and direction were changing in the actual atmosphere.
