A device for spectroscopic measurement of a gas composition wherein a helium resonance lamp includes a window partially transparent to radiation at 584A which is emitted by said lamp, the window being within a chamber. The gas to be sampled is mixed with He and placed in the chamber and the lamp is excited. Spectral radiation from the chamber is viewed and analyzed through an observation window.
5473162 - Infrared emission detection of a gas - Owned by Baylor University (Waco, TX) [*] Notice:The portion of the term of this patent subsequent to September 21, 2010 has been disclaimed.
Apparatus and method for qualitatively and quantitatively analyzing infrared emission from excited molecules in the determination of, for example, total inorganic carbon, chloride and available chlorine in aqueous samples. Methods of exciting the gas-phase, infrared-active molecules to emit radiation include flame excitation, furnace excitation, excitation by electron impact in a gas discharge or excitation by collisions with a vibrationally excited diatomic molecule. The detector is optimized by use of dual beam system with background subtraction capabilities thereby eliminating background noise and fluctuations therein.
