An assay of formaldehyde gas concentration in the silkworm-rearing room sprayed with formalin solution
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The concentration of formaldehyde gas in the silk-worm-rearing room sprayed with 3% formalin or fumigated with Neo PPS was determined by the use of 2-hydrazinobenzothiazol. Just after the spray of the formalin solution, the concentration of formaldehyde gas ranged from 250 to 300μg per a liter of air. With the time lapse after the spray the concentration decreased and about 40μg per a liter of air after 24 hours.When Neo PPS (Para formaldehyde) was fumigated, the concentration was about 600μg per a liter of air just after the disinfection and decreased rapidly to about 60μg per a liter of air after 16hours.It was found from the small-scaled eyperiment that the concentration of formaldehyde gas in air was increased in accordance with the increase in the concentration of formalin solution sprayed at varying temperature between 20 to 28°C (Fig. 4).
- 社団法人 日本蚕糸学会の論文
社団法人 日本蚕糸学会 | 論文
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