The standard method for measurement of formaldehyde in indoor air is complicated and time-consuming, so a simple measurement method that can be measured in a short time even in the field has been required. Therefore, in collaboration with universities and private enterprises, we developed a simplified method that makes concentration measurement on site easy. Furthermore, in order to evaluate the usefulness of the developed simplified measurement method (detection paper method and FP-30 method), field tests were carried out at houses etc. and compared with the standard method.
According to the developed detection paper method, it is judged to be (+), (-), (±) according to the degree of color development of the detection paper, 0.08 ppm or more for (+), 0-0.04 ppm for (-), 0.04 ~ 0.08 ppm, but the value of the standard method also falls within that range, the values are in good agreement, and the detection paper method is practical as a qualitative and simple quantitative method. In addition, good correlation was obtained between the simplified measuring instrument (FP-30 method) and the standard method, and the measured values also agreed, so practicality was confirmed. It was confirmed that the simple measurement method developed is a useful method for measuring the concentration at the site.