Environmental Monitoring Method of Di-, Tri-, Tetra-, Penta-, and Hexa-Chlorinated Biphenyls in the Gas Phase by Use of the Picosecond Laser Ionization

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Michikazu Hara²  Shinsaku Dobashi⁴  Yoshihiro Deguchi⁴  Akihide Wada¹  Yoshiki Yamaguchi³  Yoshinori Izawa³ 

[1] Molecular Photoscience Research Center, Kobe University;Chemical Resources Laboratory, Tokyo Institute of Technology;Nagasaki Shipyard & Machinery Works, Mitsubishi Heavy Industries Ltd.;Nagasaki R&D Center, Mitsubishi Heavy Industries Ltd.

关键词: Polychlorinated Biphenyls;    Environmental Monitoring;    Mass Spectrometry;    Trace Analysis;    Laser;   

DOI  :  10.1252/jcej.40.191

来源: Maruzen Company Ltd

【 摘 要 】

References(23)Cited-By(4)Utilization of the picosecond (100 ps) laser ionization was successful in measuring the mass spectra attributed to di-, tri-, tetra-, penta-, and hexa-chlorinated biphenyls. It was confirmed that the quantitative limit of this method in real-time (1 min) was 10 μg/m3N (equivalent to 1/10 of the value established as the statutory limit for PCBs in the ambient air of the workplace environment). Further evaluations of measurement accuracy based on comparisons with the results of the conventional method (gas sampling and GC-MS) demonstrated a coefficient of variation within 30%. We undertook the measurement of the exhaust gas and the work environment atmosphere in PCBs treatment plants using the LI-IT-TOFMS method, confirming that the monitoring system could be operated appropriately by the introduction of an internal standard gas (2,4-dichlorinated toluene), and that it was possible to make continuous long-term measurements for over 500 h (total measurement time, >6000 h).

【 授权许可】

Unknown