| Development of Online Headspace with Direct Mass Spectrometry for Online Monitoring of Chemicals in Water |
| 수계 화학사고 물질의 신속한 측정을 위한 온라인 헤드스페이스-직접 질량분석법 개발 |
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윤근석1, 이선홍2, 최재원3 |
1에이티프런티어
2한국수자원공사
3한국수자원공사 수자원연구원 |
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| Abstract |
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In the present study, real-time analytical method was developed to monitor the sudden chemical discharge or accident. Selected Ion Flow Tube-Mass Spectrometry (SIFT-MS) coupled with online headspace technique was applied to evaluate the feasibility of 12 organic compounds in aqueous samples for the first time in Korea. Target compounds were calibrated at five points ranged from 0.5 to 5 mg/L. As a result, the correlation coefficients of calibration curves were in the range of 0.92-0.99. From the repeated measurements, the limit of quantification (LOQ) was ranged between 0.11 and 1.28 mg/L. In the fugacity approach (closed system, steady-state assumption) transport of chemicals into the headspace is highly correlated with the air-water partition coefficient (KAW). 1,1-dichloroethene and propylene oxide showed quadratic types of calibration curves due to relatively high KAW values. These studies showed that the most organic compounds were clearly detected compared with Korean ambient water analytical guidelines. Thus, with further improvements in the increase of sensitivity and the number of detectable compounds could be a valuable online aquatic monitoring strategy. |
| Key Words:
SIFT-MS, Chemical accident, Analytical technique, Volatile organic compounds, Online headspace |
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