Abstract

A direct-current are device using coaxial electrodes and an external magnetic field is combined with a glass-frit nebulizer for the analysis of metallic elements in aqueous samples. The magnetic field is applied parallel to the electrode axis to produce a magnetron-type rotation of the are current channel. The resulting plasma is diffuse and is more easily penetrated by the aerosol particles. The plasma is viewed normal to its axis at one end of the cylindrical electrode assembly. The intense continuum background from the current channel is masked by withdrawing the center electrode into the outer cylindrical electrode. The effects of electrode configuration and plasma current on analysis line-to-background ratios are described. Preliminary analytical data are presented for Cu, Mn, Mg, and Ca.

Spectroscopic study of a dc gas magnetron discharge

V. I. Miljevic
Appl. Opt. 22(6) 904-907 (1983)

Anode Temperatures and Characteristics of the dc Arc in Noble Gases*†

Bert L. Vallee and Milton R. Baker
J. Opt. Soc. Am. 46(2) 77-82 (1956)

Vacuum Ultraviolet Plasma Arc Radiation Source for the 300–1000-A Wavelength Region

M. E. Levy and R. E. Huffman
Appl. Opt. 9(1) 41-47 (1970)

Spectroscopic Estimation of dc Arc Electrode Vapor-Jet Velocities*

Stanley C. Baker
J. Opt. Soc. Am. 54(10) 1204-1210 (1964)

Plasma spectroscopy analysis technique based on optimization algorithms and spectral synthesis for arc-welding quality assurance

J. Mirapeix, A. Cobo, D. A. González, and J. M. López-Higuera
Opt. Express 15(4) 1884-1897 (2007)