2018 Volume 28 Issue 1 Pages 9-17
Passive sampler for measuring total volatile organic compounds (TVOC) in the indoor air was developed. This sampler has characteristics with a large surface area of sampler case and high adsorption / desorption efficiency of adsorbent. Sampling rate (SR) of toluene was estimated by small chamber exposure test. Exposure tests were carried out to evaluate the effects of temperature, humidity and wind velocity on SR various. The results show that this sampler has high SR of toluene about 100 mL/min. The effects of temperature and humidity on sampling rate of this sampler are insignificant. On the other hands, the SR increased as the wind velocity increased from 0.05 to 0.7 m/s. And this sampler has strong adsorption force and has little effect of back diffusion and transportation. To survey indoor air quality, passive samplings were carried out at 34 new and 33 old houses. In most new houses, TVOC concentration were exceeded to the current provisional target value (400 µg/m3). The result of qualitative analysis, there are obvious difference between VOCs detected from wooden house and other house.
