| 摘要 |
Gases or gas mixtures are analyzed by a device and process involving laser-induced vibrational excitation of the gases or mixtures, followed by mass spectrometry. A sample of the gas is subjected to radiation, preferably infrared radiation, from a tunable laser, so as to casue vibrational-excitation of the sample by absorption of the radiation. The sample so treated is then subjected to mass spectrometry, which detects changes in the vibrational-excitation of the sample. Detection of such changes indicates infrared absorption by the sample at the wavelength at which the tunable laser is set. The wavelength of infrared absorption so determined is a characterizing property of the sample.
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