出口 祥啓

レーザイオン化TOFMSによるPCBリアルタイム計測技術(機械力学,計測,自動制御)

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=266nm is found to be substantially more effective than at λ=280, 300 or 320nm. 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 (1min) measurement using the LI-TOFMS technique is determined to be in the sub-ppbV range (<0.01mg/Nm3).

ディーゼル噴霧火炎内のNO瞬時二次元計測〔熱工学, 内燃機関, 動力など〕

Although the time-space mechanism of NOx formation in diesel injection combustion at high temperature and pressure has conventionally been pursued by the sampling method, and so forth[1], the cause-effect relationship of its formation factors remains to be more accurately clarified. In our present study, concentrations of NO, OH and soot in diesel spray flames from a single injection nozzle at high temperature and pressure were measured by use of a motoring compressed injection test system with application of laser-induced fluorescence[2], [3] and laser-induced incandescence[4], both of which can provide unperturbed measurements necessary for clarifying formation characteristics of harmful exhaust substances in diesel fuel flames at high pressure.