Real-Time PCB Monitoring Using Time-of-Flight Mass Spectrometry with Picosecond Laser Ionization

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• 作者：Yoshihiro Deguchi ; Shinsaku Dobashi ; Norihiro Fukuda ; Katsuhiko Shinoda ; and Masatoshi Morita
• 刊名：Environmental Science & Technology
• 出版年：2003
• 出版时间：October 15, 2003
• 年：2003
• 卷：37
• 期：20
• 页码：4737 - 4742
• 全文大小：280K
• 年卷期：v.37,no.20(October 15, 2003)
• ISSN：1520-5851

文摘

The study demonstrates the applicability of laser ionizationtime-of-flight mass spectrometry for real-time measurementof polychlorinated biphenyls (PCBs). Picosecond 266-nm laserlight ionization reduced fragmentation and provided veryhigh PCB detection sensitivity. This high sensitivity hasadvantages in terms of real-time monitoring capability ascompared to the conventional GC-ECD or GC-MS methods,which require at least several days for the analysis ofPCBs. Detection sensitivity of under 0.01 mg/Nm³ was achievedwith a 1-min measuring time; this sensitivity is superiorto the exhaust gas control guideline of 0.15 mg/Nm³ by afactor of 10. A prototype PCB monitoring device has beendeveloped and tested in a pilot PCB treatment plant. The1-min detection time represents a substantial advance in themonitoring of exhaust gas and the workplace atmospherein accordance with safety regulations.