Abstract
To monitor the exposure to airborne toxic substances in a small-scale workplace, such as a chemical laboratory, a real-time monitor and a passive gas sampler can be used. The apparatus is set up at the center and other points of the room so that the exposure in the room can be evaluated. Thus, we can determine whether the concentration of the above-mentioned toxic substances is high or low and determine whether or not the workplace is safe. However, when a VOC (Volatile Organic Compound) monitor is used for real-time monitoring, concentration of various toxic substances in a vapor-phase mixture are measured with the help of a passive gas sampler, and appropriate corrections are made to the obtained values. When the measurements are carried out by using a working environment measurement system, the 2nd evaluation value etc. are taken into consideration, and when the measurements are performed by using a real-time monitor, the results of the mean value are taken into consideration. The exposure evaluation can be carried out using the estimated concentrations of the toxic substances. This evaluation will be useful in the autonomous risk assessment.
