Indoor Volatile organic compounds (VOCs) are classified as known or possible toxicants and odorants. This study characterized VOC levels in 11 homes in an area in the capital of Seoul by using two different methods of VOCs sampling, which are the active sampling using a thermal sorption tube and the passive sampling using a diffusion sampler. When using the active sampling method, the total target VOC concentration ranged from 41.7 to 420.7 μg/ m3 (mean 230.4 μg/m3; median 221.8 μg/m3) during winter and 21.3 to 1,431.9 μg/m3 (mean 340.1 μg/m3; median 175.4 μg/m3) during summer. When using the passive method, 29.6 to 257.5 μg/m3 (mean 81.8 μg/m3; median 49.4 μg/m3) during winter and 1.2 to 5,131.1 μg/m3 (mean 1,758.8 μg/m3; median 1,375.1 μg/m3) during summer. Forty-nine VOCs were quantified and toluene showed the highest concentration regardless of the season and the sampling method studied. The distribution of VOCs was relatively varied by using the active method. However, it showed a low correlation with indoor environmental factors such as room temperature, humidity and ventilation time. The correlation between indoor environmental factors and VOCs were relatively high in the passive method. In particular, these characteristics were confirmed by principal component analysis.

Abstract
 1. 서 론
 2. 연구방법
  2.1 연구대상 및 기간
  2.2 시료채취 및 분석
 3. 결과 및 고찰
  3.1 계절별 환경 인자 변화
  3.2 VOCs 발생 및 농도 분포
  3.3 시료채취방법 비교
  3.4 통계분석
 4. 결 론
 References

• 이수연(서울과학기술대학교 환경공학과) | Suyeon Lee (Department of Environmental Engineering, Seoul National University of Science and Technology)
• 김대근(서울과학기술대학교 환경공학과) | Daekeun Kim (Department of Environmental Engineering, Seoul National University of Science and Technology) Corresponding author