Radiant energy – Ionic separation or analysis – With plural – simultaneous ion generators
Reexamination Certificate
2011-08-30
2011-08-30
Wells, Nikita (Department: 2881)
Radiant energy
Ionic separation or analysis
With plural, simultaneous ion generators
C250S281000, C250S282000, C250S288000, C250S3960ML, C250S42300F, C250S424000
Reexamination Certificate
active
08008619
ABSTRACT:
An interface for mass spectrometers. The interface uses non coaxial sampling pathways of the analyte ion beam prior to entering the entrance of a mass spectrometer for decreasing chemical background, and can be done in such a way as to permit multiple sprayers, increasing sample throughput and sensitivity for LC/MS (liquid chromatography/MS). The interface includes an ion source having an exit from which a beam of analyte ions are emitted, a curtain plate and an aperture in the curtain plate member, an orifice plate having an orifice therein. The orifice plate is being spaced from the curtain plate member defining a flow passageway therebetween, and the aperture in the orifice plate is aligned with a sample entrance to a first vacuum stage of a mass spectrometer maintained substantially lower than atmospheric pressure. The aperture in the curtain plate member is non coaxially aligned with the orifice in the orifice plate and the interface includes a gas flow mechanism for directing a counter flow gas into the flow passageway.
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Cousins Lisa
Javahery Gholamreza
Jolliffe Charles
Tomski Ilia
Hill & Schumacher
Ionics Mass Spectrometry Group
Schumacher Lynn C.
Wells Nikita
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