creator Braman, Robert S. creator Dynako, Alexander A method and apparatus for spectrochemical analysis of a gas is provided in which the subject gas is mixed with a carrier gas and introduced into an analysis space between two electrodes. A continuous direct current discharge between the electrodes is produced which sustains a plasma formed from the carrier gas so that components of the subject gas are excited to luminescence. Characteristic radiation emitted by the components is then detected. The carrier gas has a higher ionization potential than components of the subject gas and, for example, may be a noble gas. The method is operable at atmospheric pressure. The electrodes may be either solid wires or tubes through which the gas mixture enters and leaves the analysis space. Submitted by Aric Ahrens (ahrens@iit.edu) on 2011-09-01T18:30:51Z No. of bitstreams: 1 3612686.pdf: 413087 bytes, checksum: 7029cbdee8c9b07303c29ff1de1c3686 (MD5) Made available in DSpace on 2011-09-01T18:30:51Z (GMT). No. of bitstreams: 1 3612686.pdf: 413087 bytes, checksum: 7029cbdee8c9b07303c29ff1de1c3686 (MD5) Previous issue date: 1971-10-12 IIT Research Institute 2009-04-27 1971-10-12 3,612,686 http://hdl.handle.net/10560/2181 en United States Patent Patent reformatted digital application/pdf No Copyright - United States http://rightsstatements.org/page/NoC-US/1.0/ Open Access