Laser-induced mass spectrometry

Details Laser-induced mass spectrometry Laser-induced mass spectrometry

1977-05-02

1979-02-20

Smith, Alfred E.

Radiant energy

Ionic separation or analysis

250282, 250423P, H01J 3934

Patent

active

041409051

ABSTRACT:
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.

REFERENCES:
patent: 3521054 (1970-07-01), Webb
patent: 3937956 (1976-02-01), Lyon
"Photofragment Spectrometer" Busch et al., Univ. Cal. vol. 41, No. 7, pp. 1066- 1073.
"Laser Isotope Separation" Gross, Optical Engin. Dec. 1974, pp. 506-515.
"Ballistic Mechanism for Vib. and Rot. Energy Transfer in Art CsI Collision" Loesch et al., Journ. of Chem. Phy. vol. 57, No. 5 Sept. 1972, pp. 2038-2050.

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