Gas emission spectrometer and method

Details Gas emission spectrometer and method Gas emission spectrometer and method

G - Physics

01

N

G01N 21/67 (2006.01) G01N 21/69 (2006.01)

Patent

CA 2119917

A gas emission spectrometer and method for analyzing a continuously flowing gas stream using gas emission spectroscopy to measure low concentration levels of one or more gas/vapor impurities in the gas stream. Alternating power is applied to an electric discharge source to generate emissive radiation which is filtered into an optical signal at the emission wavelength of a preselected impurity gas. The optical signal is converted into an electrical signal which is selectively amplified within a narrow frequency range centered at substantially twice the excitation frequency of the alternating power source. The impurity concentration is measured from the amplified signal upon rectification.

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