1990 年 6 巻 4 号 p. 535-539
A badge-type passive sampler has been developed for the determination of formaldehyde (HCHO) in the atmosphere. The filter used in the sampler to collect HCHO comprises Toyo No. 1 filter paper impregnated with a NaHSO3 solution. A passive sampler was attached around either the neck or chest of the examiner; after a definite time smpler was recovered. The concentration of HCHO exposed on the filter of the sampler was then determined using a chromotropic acid-spectrophotometric method, and the HCHO concentration in the atmosphere was estimated. The permissible limit of HCHO concentrations to be measured with the sampler used in the study was 0.200-630ppm-h as a time-weighted average concentration when monitored for 8h. The reproducibility of the determined value of HCHO was excellent, with 4.3% (n=5) at the relative standard deviation. The recovery of HCHO exposed on the filter was 94.7%. The samplers exposed to HCHO showed no notable change in the HCHO concentration on filters either stored at room temperature or refrigerated for 2 weeks.
