Automated Analysis of Persistent Organic Pollutants in the Gas Phase by Laser Ionization Mass Spectrometry
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概要
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Persistent organic pollutants (POPs) are toxic chemicals that adversely affect human health and the environment around the world. The detection and evaluation of small amounts of POPs require methods with both high precision and high chemical selectivity. Conventional methods involve a number of preparatory steps and time-consuming analysis and are not suitable for the abovementioned purposes. Hence, new automated analysis methods are required for on-line detection and rapid analysis of POPs. In this paper, mass spectrometry with resonance-enhanced multi-photon ionization (REMPI) is performed to obtain information about the automated analysis of POPs in the gas-phase with on-line detection. Dynamic trapping time-of-flight mass spectrometry (TOFMS) was performed with sufficient selectivity and sensitivity for rapid analysis of polychlorinated biphenyls (PCBs) in the gas phase. Compared to normal trapping, the use of dynamic trapping enabled ion signal intensity to be increased by a factor of greater than 10. The detection limit at 1 min was <1 ppbV, and the accuracy also correlated well with the results of conventional analysis. Based on these results, an automated monitoring system was developed for automated analysis of PCBs. It was confirmed that this monitoring system was capable of analyzing PCB concentration without being influenced by main gas components or various coexisting substances, even under conditions characterized by exhaust gas and the work environment atmosphere. PCB concentration in PCB waste plants, which is substantially lower than the 0.10 mg/m3N specified in statutory regulations, could be analyzed within 1 min. It was possible to make continuous long-term analysis for over 2,000 h (120,000 points).
- 2010-04-01
著者
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DOBASHI Shinsaku
Nagasaki R&D Center, Mitsubishi Heavy Industries Ltd.
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YAMAGUCHI Yoshiki
Nagasaki Shipyard & Machinery Works, Mitsubishi Heavy Industries Ltd.
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IZAWA Yoshinori
Nagasaki Shipyard & Machinery Works, Mitsubishi Heavy Industries Ltd.
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WADA Akihide
Molecular Photoscience Research Center, Kobe University
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HARA Michikazu
Material and Structures Laboratory, Tokyo Institute of Technology
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Hara Michikazu
Material And Structures Lab. Tokyo Inst. Of Technol.
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Wada Akihide
Molecular Photoscience Res. Center Kobe Univ.
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土橋 晋作
三菱重工業(株)長崎研究所
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Dobashi Shinsaku
Nagasaki R&d Center Mitsubishi Heavy Industries Ltd.
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Dobashi Shinsaku
Nagasaki Research And Development Center Mitsubishi Heavy Industries Ltd.
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土橋 晋作
東京工業大学資源化学研究所
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Yamaguchi Yoshiki
Nagasaki Shipyard & Machinery Works Mitsubishi Heavy Industries Ltd.
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Izawa Yoshinori
Nagasaki Shipyard & Machinery Works Mitsubishi Heavy Industries Ltd.
関連論文
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