확산포집기로 공기중 ppb 농도수준의 휘발성유기물질 포집시 확산길이와 기류변화가 시료포집속도에 미치는 영향

변상훈; 톰 스톡; 마리아 모란디; 아프샤; 제이 크로스

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자료유형: 학술저널

저자정보: 변상훈 (고려대학교 병설 보건대학) 톰 스톡 (텍사스대학 공중보건학교실) 마리아 모란디 (텍사스대학 공중보건학교실) 아프샤 (텍사스대학 공중보건학교실) 제이 크로스 (텍사스대학 공중보건학교실)

저널정보: 한국산업보건학회 (구 한국산업위생학회) 한국산업보건학회지 한국산업보건학회지 제11권 제1호

발행연도: 2001.1

수록면: 34 - 41 (8page)

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Passive samplers have been used for personal, indoor, and outdoor air monitoring of VOCs at ppb concentrations in community and office environments. The path length of modified passive sampler was shortened, so it was intended to increase an uptake rate. The performance of the modified 3M 3500 organic vapor monitor(OVM) as a tool for assessing exposures to toxic air pollutants in nonoccupational community environments was evaluated using combined controlled test atmospheres of six selected target volatile organic compounds(VOCs): benzene, methyl tert-butyl ether(MTBE), chloroform, 1,4-dichlorobenzene, tetrachloroethylene, and toluene. The experiments were conducted by exposing the dosimeters to concentrations of $50{\sim}100{\mu}g/m^3$ on six face velocity(0.00, 0.02, 0.06, 0.12, 0.20, 0.30 m/sec) for 24 hours. If the uptake rate was increased, that means that we could use the passive sampler more effectively. The uptake rates were increased linearly according to reduce the path length. Although the diffusion path length was shortened, the change of uptake rate was within ${\pm}25%$ of theoretical value, indicating that the modified passive sampler(TM) can be effectively used over the range of concentrations and environmental conditions tested with a 24-h sampling period if the face velocities were over 0.12 m/s for 6 components of VOCs. But when the face velocities were less than 0.12 m/s, uptake rates were reduced more than expected values. So, the passive sampler with the shortened path length should be used at indoor or outdoor environment where the face velocity should be over about 0.10 m/s. If the path length was shortened more, the uptake rate was more effected by starvation.

#Diffusive #passive) sampler #Volatile organic compounds #VOCs) #Face velocity #Path length #Uptake rate

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