Radiant energy – Inspection of solids or liquids by charged particles
Reissue Patent
2007-05-15
2007-05-15
Berman, Jack (Department: 2881)
Radiant energy
Inspection of solids or liquids by charged particles
C250S281000, C250S306000, C250S492300
Reissue Patent
active
11020088
ABSTRACT:
A mass spectrometer has an ion source for producing sample ions. The ions pass through an ion interface, to a reaction/collision cell section. An ion-neutral decoupling device is provided between the ion interface and the reaction/collision cell section, to provide substantial separation between ions and neutral particles. The supersonic jet entering the spectrometer can have sufficient energy to cause the plasma gases, such as argon, to overcome the pressure differential between the reaction/collision cell and an upstream section of the spectrometer so as to penetrate into the reaction/collision cell; the decoupling device prevents this. The decoupling device can have offset apertures provided by plates or rods or other comparable arrangements, or can comprise a quadrupolar electrostatic deflector, an electrostatic sector deflector or a magnetic sector deflector.
REFERENCES:
patent: 4746794 (1988-05-01), French et al.
patent: 5049739 (1991-09-01), Okamoto
patent: 5381008 (1995-01-01), Tanner et al.
patent: 5481107 (1996-01-01), Takada et al.
patent: 5565679 (1996-10-01), Tanner et al.
patent: 5672868 (1997-09-01), Mordehai et al.
patent: WO98/56030 (1998-10-01), None
D.J. Douglas,Some Current Perspectives on ISP-MS, Canadian Journal of Spectroscopy, vol. 34, No. 2, 1989, pp. 38-49.
John T. Rowan et al.,Attenuation of Polyatomic Ion Interferences in Inductively Coupled Plasma Mass Spectrometry by Gas-Phase Collisions, Society for Applied Spectroscopy, vol. 43, No. 6, 1989, pp. 976-980.
I. B. Brenner,Characterization of a New Collision Cell ICP-MS for Environmental and Geochemical Analysis, 2000 Winter Conference on Plasma Spectrochemistry, Fort Lauderdale, FL., pp. 338-339.
Agilent Technologies Inc. Publication #5968-8813E, Dec. 1999, pp. 1-12.
Presentation #55 at FACSS, Oct. 25, 1999 (abstract).
Takuyuki Nabeshima et al.,Development of Ion Trap Mass Spectrometer with Plasma Ion Source, 2000 Winter Conference on Plasma Spectrochemistry, Fort Lauderdale, FL. (abstract).
Inductively Coupled Plasma Mass Spectrometry, ed. A. Montaser, 1998, p. 428.
Bandura Dmitry R.
Baranov Vladimir I.
Tanner Scott D.
Berman Jack
Hashmi Zia R.
McDermott Will & Emery LLP
MDS Inc.
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