Charged droplet spray probe

Details Charged droplet spray probe Charged droplet spray probe

2008-01-01

2008-01-01

Berman, Jack I. (Department: 2881)

Radiant energy

Ionic separation or analysis

With sample supply means

C250S281000, C204S452000, C204S603000

Reexamination Certificate

active

07315021

ABSTRACT:
An improved sample introduction probe is disclosed for the production of ions from liquid sample solutions in an electrospray ion source. Nebulization of a liquid sample emerging from the end of an inner flow tube is pneumatically assisted by gas flowing from the end of an outer gas flow tube essentially coaxial with the inner sample flow tube. The disclosed probe provides for adjustment of the relative axial positions of the ends of the liquid and gas flow tubes without degrading the precise concentricity between the inner and outer tubes. Additionally, the terminal portion of the outer gas flow tube may be fabricated either from a conductive or dielectric material, thereby allowing the pneumatic nebulization and electrospray processes to be optimized separately and independently. Hence, the disclosed invention provides a pneumatically-assisted electrospray probe with improved mechanical and operational stability, reliability, reproducibility, and ease of use compared to prior art probes.

REFERENCES:
patent: 6337480 (2002-01-01), Andrien et al.
patent: 6384411 (2002-05-01), Hirabayashi et al.
patent: 2005/0056781 (2005-03-01), Hirabayashi et al.

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