1986 Volume 1986 Issue 1 Pages 100-104
Sulfuric acid particles in the atmosphere were collected on a teflon filter. The teflon filter was placed in a teflon-stoppered test tube and 10 ml of acetone was added to extract the particles. A 30 μl of diazomethane-ether solution was added to the sample so: ution. The test tube was shaken and made to stand for 30 min. Sulfuric acid was methylated with diazomethane at room temperat ure to dimethyl sulfate and determined by a gas chromatograph with a flame 'photometric detector.
Diethyl sulfate was used as an internal stan dard for the determination of dimethyl sulfate. The detection limit of sulfuric acid particles by the proposed method was 0.1 μg/m3 in 5 m3 air. The present method was applied to the determination of sulfuric acid particles in the atmosphere at Setagaya-ku and Chiyoda-ku in Tokyo in December 1984 and JuneJuly 1985. The concentration of sulfuric acid particles, was found to be 0.2-1.2 μg/m3 and the value of [H2SO4]/[SO42-] was 0.02-0.12.
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