Abstract
The sequential and automatical VOC sampling and analysis method is developed for outgas generated from building materials in clean room and sick building. Electromagnetic valve was installed in front of the suction pump of the portable gas chromatograph(PGC) developed by the authors. This device can grasp elapsed changes of outgas from plural building materials plural in turn. 2 types of fire-resistant paints for steel frame are examined sequentially and automatically for 3 weeks. It showed that detected outgases are derived from solvent, for example ethylbenzene, m-, p-xylene and o-xylene. Fluctuations in outgas is approxi-mated to the double exponential function model better than the simple exponential function model. By using this method, long time span outgas decay can be elapsed much easier, compared with conventional Tenax-GC/MS method.
