| 摘要 |
<p>The present invention provides a laser ionization mass spectrometric apparatus comprising a sample introducing portion provided with a pulse valve which forms molecular jet, a pulsed laser beam oscillator, a vacuum ionization chamber or a corresponding portion thereto having a window capable of passing the laser beam radiated from the oscillator, and a mass spectrometer which analyzes mass of molecules ionized by the laser beam, wherein said pulse laser oscillator has an ability of oscillating ultrashort pulsed laser beam having a peak output of 1MW or more, the laser ionization mass spectrometric apparatus, wherein a turbo-molecular vacuum, pump is used as a pump which evacuates the above vacuum ionization chamber, the laser ionization mass spectrometric apparatus, where the above sample introducing portion comprises two or more pinhole nozzles, and the laser ionization mass spectrometric apparatus wherein the above slit nozzle is partitioned from the vacuum ionization chamber by a slit skimmer which inhibits stream of molecules on periphery of the molecular jet from entering the vacuum ionization chamber. The apparatus of the invention has a high sensitivity and high accuracy, and is rendered compact. Accordingly, the apparatus exercises its power over the rapid analysis of combustion exhaust gases and the like. <IMAGE></p> |
