Radiant energy – Ionic separation or analysis – With sample supply means
Patent
1993-08-30
1995-09-05
Berman, Jack I.
Radiant energy
Ionic separation or analysis
With sample supply means
7386323, 7386481, H01J 4904
Patent
active
054480620
ABSTRACT:
Described are preferred processes and apparatuses for treating samples so as to form conditioned samples for analysis, such as by a mass spectrometer. The apparatuses and processes of the invention include the use of both a membrane separator and a jet separator. This combination of separation techniques results in dramatic and unexpected increases in detection limits.
REFERENCES:
patent: 4791292 (1988-12-01), Cooks et al.
patent: 4883958 (1989-11-01), Vestal
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Bauer et al., "Performance of an Ion Trap Mass Spectrometer Modified to Accept a Direct Insertion Membrane Probe in Analysis of Low Level Pollutants in Water", Talanta, vol. 40, pp. 1031-1039 (1993).
Stern et al., "Separation of Gas Mixtures in a Supersonic Jet. II. Behavior of Helium-Argon Mixtures and Evidence of Shock Separation", J. Chem. Phys., vol. 33, pp. 805-813 (1960).
Lauritsen et al., "Microporous Membrane Introduction Mass Spectrometry with Solvent Chemical Ionization and Glow Discharge for the Direct Detection of Volatile Organic Compounds in Aqueous Solution", Anal. Chim. Acta, vol. 266, pp. 1-12 (1992).
Lauritsen et al., "Direct Detection and Identification of Volatile Organic Compounds Dissolved in Organic Solvents by Reversed-Phase Membrane Introduction Tandem Mass Spectrometry", Anal. Chem., vol. 64, pp. 1205-1211 (1992).
Bauer Scott J.
Cooks Robert G.
Berman Jack I.
MIMS Technology Development Co.
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