Radiant energy – Ionic separation or analysis – With sample supply means
Patent
1993-03-02
1994-05-03
Dzierzynski, Paul M.
Radiant energy
Ionic separation or analysis
With sample supply means
250281, 250423R, 31511121, H01J 4936
Patent
active
053089774
ABSTRACT:
A plasma mass spectrometer generates an aerosol of a sample, by dissolving the sample in a liquid solvent, and spraying the liquid into a spray chamber via a nebulizer. The solvent condenses in the spray chamber and an aerosol of the sample then passes through a supply tube to a plasma torch. Microwave power from an output on the plasma torch converts the aerosol to a plasma, and the plasma passes to an analyzer. If microwave radiation reached the spray chamber, it would cause heating of the solvent which may evaporate it so that the solvent would be present in the plasma. Therefore, there is a wall between the spray chamber and the plasma torch and microwave output which blocks such microwave radiation.
REFERENCES:
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Tan et al. "Background Spectral Features in Inductively Coupled Plasma/Mass Spectrometry" vol. 40, No. 4, 1986, pp. 445-460.
Tsukahara et al. "Studies with desolvation in inductively coupled plasma-mass spectrometry" vol. 45B, No. 6, Jul., 1989, pp. 581-589.
Shen et al. "A Moderate-Powder Nitrogen Microwave-Induced Plasma as an Alternative Ion Source for Mass Spectrometry", vol. 44, No. 6, 1990, pp. 1003-1010.
Okamoto "Annular-shaped Microwave-Induced Nitrogen Plasma at Atmospheric Pressure for Emission Spectrometry of Solutions" Analytical Sciences, Apr., 1991, pp. 283-288.
Shen et al. "Background Spectral Features for Moderate-Power Nitrogen Microwave-Induced Plasma-Mass Spectrometry" vol. 44, No. 6, 1990, pp. 1017-1014.
Iino Takashi
Koga Masataka
Nishitarumizu Tsuyoshi
Oishi Konosuke
Okumoto Toyoharu
Dzierzynski Paul M.
Hitachi Ltd
Nguyen Kiet T.
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