Abstract
The indoor NO_2 concentration in Japanese dwellings were measured with various parameters using badge-type passive monitors. The comparison of the method by badge-type passive samplers developed by Dr. Yanagisawa and the conventional chemi-luminescence method was made in the measurement of indoor NO_2 concentration. The measured values with badge-type samplers agree with the ones from the chemi-luminescence monitors. Indoor NO_2 concentration is mainly influensed not by the outdoor concentration but the usage of combustion appliances, especially the type and the usage time of appliances. The life pattern in the room also influenced the indoor NO_2 levels.
