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

Dobashi, Shinsaku; Yamaguchi, Yoshiki; Izawa, Yoshinori; Deguchi, Yoshihiro; Wada, Akira; Hara, Michikazu

doi:10.1252/jcej.40.191

Cited by 3 publications

(3 citation statements)

References 22 publications

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“…41), 42), 45), 46) The LI-IT-TOFMS was developed by combining an ion-trap function with direct gas introduction-type laser ionization (o#ering molecular selectivity and a fragment-free operation), and consideration was given to the high sensitivity required for the rapid analysis of di-, tri-, and tetra-chlorinated biphenyls. It was confirmed that a laser with a pulse duration of 100 ps clearly generated a stronger PCB ion signal than a 5 ns pulse laser, by a factor of more than 10.…”

Section: )῏68)mentioning

confidence: 99%

“…45), 46) We used the internal standard gas (2,4-di-chlorinated toluene) in order to check the correct operation of the monitoring system. 46) It was confirmed that the PCB concentration in the environmental gas (which is substantially lower than the value of 0.10 mg/m 3 N as specified by statutory regulations), can be analyzed within 1 min. We also confirmed that it is possible to perform continuous long-term analysis for over 2,000 h.…”

Section: )῏68)mentioning

confidence: 99%

“…The PCBs collected by the n-hexane solvent were then analyzed by GC-MS. (Reprinted with permission from ref. 46, ῌ2007, The Society of Chemical Engineers, Japan. )…”

Section: Automated Analysis System Of Pcbsmentioning

confidence: 99%

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Automated Analysis of Persistent Organic Pollutants in the Gas Phase by Laser Ionization Mass Spectrometry

Dobashi

Yamaguchi

Izawa

et al. 2010

J. Mass Spectrom. Soc. Jpn.

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Persistent organic pollutants (POPs) are toxic chemicals that adversely a#ect 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 su$cient 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/m 3 N 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).

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Section: )῏68)mentioning

confidence: 99%

Section: )῏68)mentioning

confidence: 99%

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Automated Analysis of Persistent Organic Pollutants in the Gas Phase by Laser Ionization Mass Spectrometry

Dobashi

Yamaguchi

Izawa

et al. 2010

J. Mass Spectrom. Soc. Jpn.

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Safety management by use of laser mass spectrometry of polychlorinated biphenyls (PCBs) in the processed gas and work environment of a PCB disposal plant

Dobashi

Yamaguchi

Izawa

et al. 2009

J Mater Cycles Waste Manag

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This study demonstrates the applicability of laser mass spectrometry for safety management of the processed gas and the work environment in a polychlorinated biphenyl (PCB) disposal plant. By utilization of laser ionization/ ion trapping storage/time-of-fl ight mass spectrometry (LI-IT-TOFMS), we analyzed gaseous PCBs from scrap capacitors with on-line detection. It was confi rmed that few contaminants were detected in the spectrum. By the effect of laser-induced selective ionization, it was considered that there was little interference with the mass range of PCBs. The accuracy of LI-IT-TOFMS when analyzing environmental gas was almost the same as that for the PCB standard gas. It was possible to perform on-line analysis of the work environment for over 2000 h (120 000 data points). LI-IT-TOFMS was thus shown to be a very useful method for ensuring the safety of the work environment in disposal plants for PCBs. Figure 1 presents an overview of the LI-IT-TOFMS method. Mass spectrometry with laser ionization, which features molecular selectivity and fragment-free ionization over short time periods, 6-8 is a very suitable method for environmental trace analysis. The advantage of ion trap source-J Mater Cycles Waste Manag (2009) 11:148-154

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The Molecular Identification of Organic Compounds in the Atmosphere: State of the Art and Challenges

et al. 2015

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

Cited by 3 publications

References 22 publications

Automated Analysis of Persistent Organic Pollutants in the Gas Phase by Laser Ionization Mass Spectrometry

Automated Analysis of Persistent Organic Pollutants in the Gas Phase by Laser Ionization Mass Spectrometry

Safety management by use of laser mass spectrometry of polychlorinated biphenyls (PCBs) in the processed gas and work environment of a PCB disposal plant

The Molecular Identification of Organic Compounds in the Atmosphere: State of the Art and Challenges

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