Electric heating – Metal heating – By arc
Patent
1984-03-06
1986-03-11
Paschall, M. H.
Electric heating
Metal heating
By arc
219121PR, 219121PQ, 31511151, 2394245, 356316, B23K 900, G01N 2173
Patent
active
045756090
ABSTRACT:
A concentric micro-nebulizer and method for introducing liquid samples into a plasma established in a plasma torch including a first tube connected to a source of plasma gas. The concentric micro-nebulizer has inner and outer concentric tubes extending upwardly within the torch for connection to a source of nebulizer gas and to a source of liquid solvent and to a source of sample liquid. The inner tube is connected to the source of liquid solvent and to the source of sample liquid and the outer tube is connected to the source of nebulizer gas. The outer tube has an orifice positioned slightly below the plasma when it is established, with the inner and outer tubes forming an annulus therebetween with the annular spacing between the tubes at said orifice being less than about 0.05 mm. The dead volume of the inner tube is less than about 5 microliters.
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Direct Liquid Sample Introduction into an Inductively Coupled Argon Plasma, Rice et al., Abstract #145, Pittsburgh Conference, Ames Lab.
Fassel Velmer A.
Lawrence Kimberly E.
Rice Gary W.
Hightower Judson R.
Paschall M. H.
Rees Walter L.
The United States of America as represented by the United States
Weinberger James W.
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