The Influence of Discharge-Tube Cooling on the Performance of Surface-Wave Plasmas Intended as Element-Specific Detectors for Gas Chromatography

Authors: Sing, Robert L. A.; Lauzon, Claude; Tran, Khanh Chi; Hubert, Joseph

Source: Applied Spectroscopy, Volume 46, Issue 3, Pages 395-549 (March 1992) , pp. 430-435(6)

Publisher: Society for Applied Spectroscopy

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Direct water cooling of the discharge tube of surfatron-sustained plasmas is implemented. Discharge tubes of 2 mm i.d. × 0.1 mm wall thickness are able to sustain He plasmas at incident power levels up to 500 W for prolonged periods without severe degradation. The emission spectra and noise amplitude spectra of water-cooled plasmas are compared to those for the air-cooled, thick-walled discharge tubes commonly employed. Incident power and tube diameter optimizations are discussed.

Keywords: Atomic emission spectrometry; Microwave-induced plasma; Torch design

Document Type: Research Article


Affiliations: Département de chimie, Université de Montréal, P.O. Box 6128 Station A, Montreal, Quebec, H3C 3J7, Canada

Publication date: March 1, 1992

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