| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser ionization mass spectrometer capable of directly analyzing dioxins in exhaust gas. SOLUTION: This mass spectrometer is equipped with a sample introduction means 15 for introducing continuously exhaust gas 13 from a gas duct 12 into a vacuum chamber 11 as leakage molecular beams 14, a first laser irradiation means 18 for irradiating femto-second pulse laser beams 17 into the introduced leakage molecular beams 14 through a condensing lens 16, a second laser irradiation means 20 for irradiating the condensing position of the first laser beams 17 with nano-second pulse laser beams 19 with the same optical axis, and a time-of-flight mass spectrometer 23 equipped with an ion detector 22 for analyzing molecular ion 21 generated respectively by irradiation of the first laser beams 17 and the second laser beams 19.
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