Inductively coupled plasma torch with laminar flow cooling

Details Inductively coupled plasma torch with laminar flow cooling Inductively coupled plasma torch with laminar flow cooling

1989-11-20

1991-04-30

Paschall, M. H.

Electric heating

Metal heating

By arc

21912151, 21912149, 21912148, 31511151, B23K 900

Patent

active

050120654

ABSTRACT:
An improved inductively coupled gas plasma torch. The torch includes inner and outer quartz sleeves and tubular insert snugly fitted between the sleeves. The insert includes outwardly opening longitudinal channels. Gas flowing through the channels of the insert emerges in a laminar flow along the inside surface of the outer sleeve, in the zone of plasma heating. The laminar flow cools the outer sleeve and enables the torch to operate at lower electrical power and gas consumption levels additionally, the laminar flow reduces noise levels in spectroscopic measurements of the gaseous plasma.

REFERENCES:
patent: 4035604 (1977-07-01), Meleka et al.
patent: 4266113 (1981-05-01), Denton et al.
patent: 4482246 (1984-11-01), Meyer et al.
patent: 4716269 (1987-12-01), Carkhuff
patent: 4833294 (1989-05-01), Montaser et al.
"Design and Construction of a Low-Flow, Low-Power Torch for Inductively Coupled Plasma Spectrometry" by R. Rezaaiyaan, et al, Applied Spectroscopy, vol. 36, p. 627 (1982).
"Development and Characterization of a Miniature Inductively Coupled Plasma Source for Atomic Emission Spectrometry" by R. N. Savage, et al., Anal. Chem., vol. 51, p. 408 (1979).
"Development and Characterization of a 9-mm Inductively-Coupled Argon Plasma Source for Atomic Emission Spectrometry" by A. D. Weiss, et al, Anal. Chem., vol. 124, p. 245 (1981).
"Reduction of Argon Consumption by a Water Cooled Torch in Inductively Coupled Plasma Emission Spectrometry" by G. R. Kornblum, et al, Anal. Chem., vol. 51, p. 2378 (1979).
"Water-Cooled Torch for Inductively Coupled Plasma Emission Spectrometry" by H. Kawaguchi, et al., Anal. Chem., vol. 52, p. 2440 (1980).
"A New Reduced-Pressure ICP Torch" by C. J. Seliskar et al, Applied Spectroscopy, vol. 39, p. 181 (1985).
"Determination of Metals in Zylene by Inductively Coupled Air Plasma Emisson Spectrometry" by G. A. Meyer, Spectrochim. Acta, Part B, vol. 42B, p. 201 (1987).
"A Radiatively Cooled Torch for ICP-AES Using 1 lmin.sup.-1 of Argon" By P. S. C. Van Der Plas et al, Spectrochim. Acta, vol. 39B, p. 1161 (1984).
"Analytical Characteristics of a Low-Flow, Low-Power Inductively Coupled Plasma" by R. Rezaaiyaan et al., Anal. Chem., vol. 57, p. 412 (1985).
"Interferences in a Low-Flow, Low-Power Inductively Coupled Plasma" by R. Rezaaiyaan, et al., Spectrochim. Acta, Part B, vol. 40B, p. 73 (1985).
"Noise-Power Spectra of Optical and Acoustic Emission Signals from an Inductively Coupled Plasma" by R. M. Belchamber et al., Spectrochim. Acta, Part B, vol. 37B, p. 17 (1982).
"Low-Noise Laminar Flow Torch for Inductively Coupled Plasma Atomic-Emission Spectrometry" by J. Davies, et al., Analyst, vol. 110, p. 887 (1985).
"Off-Axis Imaging for Improved Resolution and Spectral Intensities" by S. G. Salmon, et al,. Anal. Chem., vol. 50, p. 1714 (1978).
"Short-Time Electrode Processes and Spectra in a High-Voltage Spark Discharge" by J. P. Walters, Anal. Chemn, vol. 40, p. 1540 (1968).
"A Spectrometer for Time-Gated, Spatially-Resolved Study of Repetitive Electrical Discharges" by R. J. Klueppel, et al. Spectrochim. Acta, Part B, vol. 33, p. 1 (1978).
"Nomenclature System for the Low-Power Argon Inductively Coupled Plasma" by S. R. Koirtyohann, et al., Anal. Chem., vol. 52, p. 1965 (1980).
"Laminar-Flow Torch of Helium Inductively Coupled Plasma Spectrometry" by H. Tan, et al, Anal Chem, vol. 60 pp. 2542-2544 (1988).
"Studies of a Low-Noise Laminar Flow Torch for Inductively Coupled Plasma Atomic Emission Spectrometry, Part 2, Noise Power Studies and Interference Effects" by Davies, et al Journal of Analytical Atomic Spec (vol. 2, pp. 27-31, (1987).
"Studies of a Low-Noise Laminar Flow Torch for Inductively Coupled Plasma Atomic Emission Spectrometery" by J. Davies, et al., Journal of Analytical Atomic Spectrometry, vol. 1 (1986).

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