Development of Continuous Analysis and Automatic Sampling of Atmospheric Pesticides
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概要
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A continuous air analyzer and an automatic air sampler were experimentally developed to measure the time dependence of concentrations of atmospheric pesticides. The analyzer and sampler operated in field measurement to confirm their effectiveness.<BR>Collection tubes were packed with TENAX-GC to absorb air pollutants. Experiments showed that the tubes could recover 100% of the original amount of the added typical insecticide, Fenitrothion.<BR>The continuous air analyzer directly connected to a gas chromatography unit was in operation for three months in Maebashi city to measure a fungcide, Quintozene (PCNB), as a pollutant and Dibutylphtalate (DBP) as a continuously existing atmospheric substance. A total of 790 measurements were taken at every two hours; PCNB was detected in 308 measurements and the maximum concentration was 185ng/m<SUP>3</SUP>. The deviation of the difference of both retention times was small (±0.07 min.) enough to allow qualitative analyses of pollutants. The analyzer is prospective as a monitoring device installed, for example, in the neighborhood of a stationary source of pesticides.<BR>The automatic air sampler worked in a number of field measurements. For example, an insecticide, Chlordane, sprayed in a living room four years before was collected. When all the windows were closed, the concentration of atmospheric Chlordane remained 0.44±0.12μg/m<SUP>3</SUP> for six days sampling. The sampler was also used for two days to measure the concentration of a herbicide, Simazin, sprayed on the grass around an apartment complex; the maximum value was 0.71μg/m<SUP>3</SUP>. The lightweight, easy-to-operate sampler permits analyzing a number of samples in field works about atmospheric pesticides throughout the world.
- 社団法人 大気環境学会の論文
社団法人 大気環境学会 | 論文
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