The concentrations of SO_2 and SO_3 were measured to estimate a new developed long time exposure SO_2 sampler at Onsan industrial area considering the meteorological factors from June to October, 1992. The mean concentration of SO_3 by PbO_2 method was 0.924 ㎎ S0_3/100㎠ PbO_2/day and their high values were shown in the center of the industrial area, which show potential pollution due to the increase of industrial activities and micrometeorological factors in and around the sites. As a result of statistical correlation between SO_2 concentration by new sampling method and SO_3 concentration by PbO_2 method in July and August, 1992, correlation coefficients were high (r=0.87, 0.91) and shown more than 0.83 value in the high concentration data set, which was arbitrarily divided into 7-10㎕ SO_2 concentration in an attempt to further investigate these relationships. Therefore, use of new developed long time exposure SO_2 sampler is good for SO_2 measurement and valuable for estimation of air quality in the urban and industrial area.

• 이동인 | Dong In Lee