Continuous Measurements of Air Pollutions in Korea by the Portable Automatic GC Analyzer.

The automatic analysis system of a portable gas chromatograph was designed to measure the organic pollutants in urban air. This equipment was composed of three parts ; PID-gas chromatograph unit (60×22×52cm, 22kg), integrator (Shimadzu CR 6 A, 8.5kg) and He bonbe (16kg). Samples were automatically concentrated in the Tenax-GC glass tube by a vacuum pump, which is able to take 3 liters air for 12 minutes. After the carrier gas flowed in the absorbent glass tube, it reached suddenly to 210℃ within a minute. At the same time, ananalytical column (SPB-1, Fused Silica Capillary 0.32mmφ×25m thick 1.0μm) was kept at 80℃. We investigated in terms of C_6～C_9 aromatic hydrocarbons (12 components), trichloroethylene, tetrachloroethylene and p-dichlorobenzene in order to test this system and knew the air pollution level in Korea. The range of each concentration was 10.5-71.5ppb intoluene, 2.3-17.0ppb in benzene, 3.6-33.0ppb in m, p-xylene in Seoul, Korea. These data were nearly similar to those in Japan. The practical application of this system in field work was judged good