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Characterization of Near-Infrared Atomic Emission from a Radio-Frequency Plasma for Selective Detection in Capillary Gas Chromatography

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Abstract:

A radio-frequency plasma source has been characterized for use as an element-selective detector with capillary gas chromatography using atomic emission in the near-infrared region of the spectrum. With selected compounds introduced at rates similar to those encountered during a chromatographic run, the performance of the plasma has been characterized as a function of several interdependent variables, including plasma makeup gas flow, electrode spacing, and applied power. These settings have been optimized, and detection limits for several nonmetallic elements determined. Detection limits range from 0.2 to 50 pg/s.

Keywords: Atomic emission spectroscopy; Element-selective detector; Gas chromatography

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702904086993

Affiliations: 1: Department of Chemistry, Brigham Young University, Provo, Utah 84602; current address: Shell Development Company, P.O. Box 1380, Houston, TX 77251 2: Department of Chemistry, Brigham Young University, Provo, Utah 84602

Publication date: June 1, 1990

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