Department of Environmental Management, School of Health Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka 807-8555, Japan.
Environ Health Prev Med. 2013 Jul;18(4):285-92. doi: 10.1007/s12199-012-0319-1. Epub 2012 Nov 27.
Real time monitoring of total volatile organic compounds (TVOC) in rooms of Japanese university buildings was carried out to understand the temporal changes in actual indoor air quality.
The TVOC concentrations in seven different rooms, consisting of a lecture room, a seminar room, three laboratories, a computer room and a library, were monitored continuously for 24 h via a personal VOC monitor equipped with a semiconductor gas sensor. An active sampling-thermal desorption method using stainless steel tubes packed with Tenax-TA was also carried out simultaneously to verify the usability of the monitor.
The TVOC concentrations measured by the personal VOC monitor were closely correlated with those measured by the active sampling method. The TVOC concentration in all rooms was generally low during the day and increased during the night. This concentration change corresponded to the ventilation cycle in the building. During the day, the TVOC concentration was generally lower than the provisional target criterion (advisable value) of indoor air quality in Japan (400 μg/m³). During the night, however, it exceeded this criterion in several rooms, especially during the summer season.
The real-time monitor using a semiconductor gas sensor can provide useful data on changes in the TVOC concentration in indoor air with high sensitivity.
实时监测日本大学建筑房间内的总挥发性有机化合物（TVOC），以了解实际室内空气质量的时间变化。
通过配备半导体气体传感器的个人 VOC 监测仪，对一个教室、一个研讨室、三个实验室、一个计算机房和一个图书馆等七个不同房间的 TVOC 浓度进行了 24 小时连续监测。同时还采用不锈钢管填充 Tenax-TA 的主动采样-热解吸法进行了验证。
个人 VOC 监测仪测量的 TVOC 浓度与主动采样法测量的浓度密切相关。所有房间的 TVOC 浓度通常在白天较低，夜间升高。这种浓度变化与建筑物的通风循环相对应。白天，TVOC 浓度通常低于日本室内空气质量的临时目标标准（建议值）（400μg/m³）。然而，在夜间，特别是在夏季，几个房间的 TVOC 浓度超过了这个标准。
使用半导体气体传感器的实时监测器可以提供高灵敏度的室内空气 TVOC 浓度变化的有用数据。
