TY - JOUR
T1 - Real-time measurement of polychlorinated biphenyls using laser ionization time of flight mass spectroscopy
AU - Dobashi, Shinsaku
AU - Noda, Matsuhei
AU - Deguchi, Yoshihiro
AU - Fukuda, Norihiro
AU - Kubota, Takahiro
PY - 2003/11
Y1 - 2003/11
N2 - Polychlorinated biphenyls (PCBs) are environmental chemicals and there are few methods for real-time PCB measurement. This study demonstrates the applicability of the real-time measurement of PCBs using LI-TOFMS (Laser Ionization Time of Flight Mass Spectroscopy). In order to develop a highly selective and sensitive method, the effective laser wavelength and pulse width for laser ionization of PCBs are discussed. Excitation at λ = 266 nm is found to be substantially more effective than at λ = 280, 300 or 320 nm. Also picosecond excitation for PCBs undergoes more efficient ionization (by a factor of over 10) and less fragmentation than nanosecond excitation. The achievable trichlorinated biphenyl sensitivity for real-time (1 min) measurement using the LI-TOFMS technique is determined to be in the sub-ppbV range (< 0.01 mg/Nm3).
AB - Polychlorinated biphenyls (PCBs) are environmental chemicals and there are few methods for real-time PCB measurement. This study demonstrates the applicability of the real-time measurement of PCBs using LI-TOFMS (Laser Ionization Time of Flight Mass Spectroscopy). In order to develop a highly selective and sensitive method, the effective laser wavelength and pulse width for laser ionization of PCBs are discussed. Excitation at λ = 266 nm is found to be substantially more effective than at λ = 280, 300 or 320 nm. Also picosecond excitation for PCBs undergoes more efficient ionization (by a factor of over 10) and less fragmentation than nanosecond excitation. The achievable trichlorinated biphenyl sensitivity for real-time (1 min) measurement using the LI-TOFMS technique is determined to be in the sub-ppbV range (< 0.01 mg/Nm3).
KW - Laser
KW - Measurement
KW - Nanosecond excitation
KW - Picosecond excitation
KW - Polychlorinated biphenyls
KW - Resonance enhanced two-photon ionization
KW - Time of flight mass spectroscopy
UR - https://www.scopus.com/pages/publications/0742321238
U2 - 10.1299/kikaic.69.3047
DO - 10.1299/kikaic.69.3047
M3 - 文章
AN - SCOPUS:0742321238
SN - 0387-5024
VL - 69
SP - 3047
EP - 3052
JO - Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
JF - Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
IS - 11
ER -