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Title: Low-pressure water-cooled inductively coupled plasma torch

Abstract

An inductively coupled plasma torch is provided which comprises an inner tube, including a sample injection port to which the sample to be tested is supplied and comprising an enlarged central portion in which the plasma flame is confined; an outer tube surrounding the inner tube and containing water therein for cooling the inner tube, the outer tube including a water inlet port to which water is supplied and a water outlet port spaced from the water inlet port and from which water is removed after flowing through the outer tube; and an r.f. induction coil for inducing the plasma in the gas passing into the tube through the sample injection port. The sample injection port comprises a capillary tube including a reduced diameter orifice, projecting into the lower end of the inner tube. The water inlet is located at the lower end of the outer tube and the r.f. heating coil is disposed around the outer tube above and adjacent to the water inlet.

Inventors:
 [1];  [2]
  1. (Cincinnati, OH)
  2. (Centerville, OH)
Publication Date:
Research Org.:
MONSANTO RESEARCH CORP
OSTI Identifier:
866806
Patent Number(s):
US 4794230
Application Number:
06/580,983
Assignee:
United States of America as represented by United States (Washington, DC) SNL
DOE Contract Number:  
AC04-76DP00053
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
low-pressure; water-cooled; inductively; coupled; plasma; torch; provided; comprises; inner; tube; including; sample; injection; tested; supplied; comprising; enlarged; central; portion; flame; confined; outer; surrounding; containing; water; therein; cooling; inlet; outlet; spaced; removed; flowing; induction; coil; inducing; gas; passing; capillary; reduced; diameter; orifice; projecting; located; heating; disposed; adjacent; water inlet; gas passing; pressure water; tube surrounding; induction coil; tube including; inductively coupled; inner tube; capillary tube; plasma torch; outer tube; central portion; coupled plasma; containing water; sample injection; reduced diameter; water outlet; heating coil; /219/315/356/

Citation Formats

Seliskar, Carl J., and Warner, David K. Low-pressure water-cooled inductively coupled plasma torch. United States: N. p., 1988. Web.
Seliskar, Carl J., & Warner, David K. Low-pressure water-cooled inductively coupled plasma torch. United States.
Seliskar, Carl J., and Warner, David K. Tue . "Low-pressure water-cooled inductively coupled plasma torch". United States. https://www.osti.gov/servlets/purl/866806.
@article{osti_866806,
title = {Low-pressure water-cooled inductively coupled plasma torch},
author = {Seliskar, Carl J. and Warner, David K.},
abstractNote = {An inductively coupled plasma torch is provided which comprises an inner tube, including a sample injection port to which the sample to be tested is supplied and comprising an enlarged central portion in which the plasma flame is confined; an outer tube surrounding the inner tube and containing water therein for cooling the inner tube, the outer tube including a water inlet port to which water is supplied and a water outlet port spaced from the water inlet port and from which water is removed after flowing through the outer tube; and an r.f. induction coil for inducing the plasma in the gas passing into the tube through the sample injection port. The sample injection port comprises a capillary tube including a reduced diameter orifice, projecting into the lower end of the inner tube. The water inlet is located at the lower end of the outer tube and the r.f. heating coil is disposed around the outer tube above and adjacent to the water inlet.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 27 00:00:00 EST 1988},
month = {Tue Dec 27 00:00:00 EST 1988}
}

Patent:

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