Real-time PCB monitoring using time-of-flight mass spectrometry with picosecond laser ionization
| Autor: | Shinoda Katsuhiko, Shinsaku Dobashi, Norihiro Fukuda, Masatoshi Morita, Yoshihiro Deguchi |
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| Rok vydání: | 2003 |
| Předmět: |
Detection limit
Air Pollutants Time Factors Chemistry Lasers Analytical chemistry Exhaust gas General Chemistry Mass spectrometry Laser Polychlorinated Biphenyls Sensitivity and Specificity Mass Spectrometry law.invention law Ionization Picosecond Environmental Chemistry Humans Environmental Pollutants Time-of-flight mass spectrometry Workplace Ultrashort pulse Environmental Monitoring |
| Zdroj: | Environmental sciencetechnology. 37(20) |
| ISSN: | 0013-936X |
| Popis: | The study demonstrates the applicability of laser ionization time-of-flight mass spectrometry for real-time measurement of polychlorinated biphenyls (PCBs). Picosecond 266-nm laser light ionization reduced fragmentation and provided very high PCB detection sensitivity. This high sensitivity has advantages in terms of real-time monitoring capability as compared to the conventional GC−ECD or GC−MS methods, which require at least several days for the analysis of PCBs. Detection sensitivity of under 0.01 mg/Nm3 was achieved with a 1-min measuring time; this sensitivity is superior to the exhaust gas control guideline of 0.15 mg/Nm3 by a factor of 10. A prototype PCB monitoring device has been developed and tested in a pilot PCB treatment plant. The 1-min detection time represents a substantial advance in the monitoring of exhaust gas and the workplace atmosphere in accordance with safety regulations. |
| Databáze: | OpenAIRE |
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