ABSTRACT
To check whether there are any adverse health effects of pollutants in indoor air, it is necessary first to measure the indoor concentration of pollutants. Usually, to know the composition and concentrations of pollutants, the pollutants are collected in an adsorbent and accurate analysis is conducted using analytical instruments. This method is called integration measurement. The concentration obtained by integration measurement indicates an average concentration in the sampling period. On the other hand, there are real-time monitors that can measure total concentrations of pollutants instantly though the composition of pollutants cannot be known. The measurement method by such monitors is called instant measurement. The instant measurement method has the advantage that concentrations can be known on site. Moreover, because the pollutant concentration can be monitored continuously, the change in concentration can be known. Devices that can measure both composition and concentrations of indoor pollutants instantly are rare at present. Therefore, it is necessary to choose integration measurement or instant measurement, based on the purpose of the measurement.
