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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 39, Iss. 2 — Mar. 1, 1985
  • pp: 214–222

Development of a Microwave-Induced Nitrogen Discharge at Atmospheric Pressure (MINDAP)

R. D. Deutsch and G. M. Hieftje

Applied Spectroscopy, Vol. 39, Issue 2, pp. 214-222 (1985)


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Abstract

A microwave-induced plasma has been sustained with the use of nitrogen as the nebulizer and plasma supporting gas. A concentric tube torch was constructed so the plasma could be easily ignited and maintained. This new plasma emission source has a flame-like appearance and extends 10 cm beyond the cavity, at an applied power of 250 W. The nitrogen plasma readily accepts aerosol samples and is compatible with sample introduced from a conventional nebulizer system. The radial (side-on) optical viewing configuration was found to have lower background emission than the more commonly employed axial (end-on) configuration. Optimum operating conditions were established from the effects of applied power, flow rate, and signal-to-background noise on the intensity of both atom and ion transitions. A discussion of the background spectral features and the analytical potential of this new source is presented.

Citation
R. D. Deutsch and G. M. Hieftje, "Development of a Microwave-Induced Nitrogen Discharge at Atmospheric Pressure (MINDAP)," Appl. Spectrosc. 39, 214-222 (1985)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-39-2-214

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