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SOLUTION NEBULIZATION OF AQUEOUS SAMPLES INTO THE TUBULAR-ELECTRODE TORCH CAPACITATIVELY-COUPLED MICROWAVE PLASMA (JOURNAL VERSION)
Citation:
Patel, B., J. Deavor, AND J. Winefordner. SOLUTION NEBULIZATION OF AQUEOUS SAMPLES INTO THE TUBULAR-ELECTRODE TORCH CAPACITATIVELY-COUPLED MICROWAVE PLASMA (JOURNAL VERSION). U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-88/227 (NTIS PB89144588), 1988.
Description:
The work shows the feasibility of using nebulization for introduction of aqueous samples into the tubular-torch capacitatively-coupled microwave plasma (CMP). Previously, solid electrodes were used with this type of plasma, in which analyte carrier and plasma support gases are premixed and swept around the electrode tip. With the new design, the analyte carrier gas passes through the center of the hollow tubular electrode and mixes with the plasma support gas at the tip of the electrode where the plasma is formed. Sample solutions are nebulized with a Meinhard nebulizer and laboratory-constructed spray chamber and desolvation system. The tubular torch is made of tantalum. Plasma gases investigated include argon, helium and nitrogen. Typical operating powers are 300-350 W. Elements studied include Ag, Al, Ba, Ca, Cd, Cr, Cs, Cu, K, Li, Na, Pb, Sr and Zn. (Copyright (c) 1988 Pergamon Press plc.)