Fig. 2From: Evaluation of a real-time method for monitoring volatile organic compounds in indoor air in a Japanese universityChange in the VOC concentrations in laboratory-1 measured with the VOC monitor (May 8–9). Dashed line is the TVOC concentration estimated by a perfect mixing model with an air exchange rate of 0.12 h−1 during the night, 0.9 h−1 during the day and a TVOC emission rate of 40 mg/hBack to article page