有機溶剤ガス人体暴露実験室

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As the determination of the maximum allowable concentration of organic solvents requires investigations of the physical responses of man to specified gas concentrations, a gas chamber for that purpose was constructed. The chamber is 2.23 m wide, 3.55 m long, and 2.80 m high, the cubic space being about 23 m^3, and it is large enough for two or three men to work to a certain extent at a time. All the walls are shielded with wire netting for undisturbed electrophysiological experiments. The inside of the chamber is furnished like an ordinary living room lest the subject should be strained unnecessarily. Gas generators, concentration measuring apparatus, and electro-physiological apparatus are all equipped outside so that the experimenter may easily operate them observing the inside through the window. To produce a constant gas concentration a method is adopted in which a constant fresh air flow is kept through the air duct in which the solvent vapour is being shot with a spray gun; the quantity of the vapour is adjustable with a screw. An experiment on the function of the chamber under conditions, that tow men were working moderately within and 3.5 m^3/min acetone gas was kept sending in, obtained a satisfactory result in which no liability of CO_2 accumulation was noticed and the concentration of the solvent kept its stability throughout 6 hours' operation after the first 40 minutes of variation. The range of the concentration to be adjusted with comparative ease was 100∼2000 p.p.m. Though the result of the experiment was pretty satisfactory, the points required for further improvement are: 1) that the noises caused by a fan and by the spray- gun be abated, 2) that a climate adjuster be installed, 3) that the adjustment for concentrations lower than 100 p.p.m.or higher than 2000 p.p.m. be further contrived, 4) that an anemometer for gauging the quantity of the air flow be equipped, and 5) that a gas-chromatograph for the measurement of solvent concetrations be equipped.
社団法人日本産業衛生学会の論文
1968-08-20

有機溶剤ガス人体暴露実験室

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