Patel B M, Deavor J P, Winefordner J D
Department of Chemistry, University of Florida, Gainesville, FL 32611, U.S.A.
Talanta. 1988 Aug;35(8):641-5. doi: 10.1016/0039-9140(88)80146-2.
This 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 centre 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 a 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, Pd, Sr and Zn.
这项工作展示了使用雾化法将水性样品引入管状炬电容耦合微波等离子体（CMP）的可行性。此前，这种类型的等离子体使用的是固体电极，其中分析物载气和等离子体支持气体预先混合，并围绕电极尖端吹扫。采用新设计后，分析物载气通过空心管状电极的中心，并在形成等离子体的电极尖端与等离子体支持气体混合。样品溶液用Meinhard雾化器以及实验室构建的喷雾室和去溶剂化系统进行雾化。管状炬由钽制成。所研究的等离子体气体包括氩气、氦气和氮气。典型的运行功率为300 - 350瓦。所研究的元素包括银、铝、钡、钙、镉、铬、铯、铜、钾、锂、钠、铅、钯、锶和锌。
