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Title: Electrospray ionizer for mass spectrometry of aerosol particles

A device and method are disclosed to apply ESI-based mass spectroscopy to submicrometer and nanometer scale aerosol particles. Unipolar ionization is utilized to charge the particles in order to collect them electrostatically on the tip of a tungsten rod. Subsequently, the species composing the collected particles are dissolved by making a liquid flow over the tungsten rod. This liquid with dissolved aerosol contents is formed into highly charged droplets, which release unfragmented ions for mass spectroscopy, such as time-of-flight mass spectroscopy. The device is configured to operate in a switching mode, wherein aerosol deposition occurs while solvent delivery is turned off and vice versa.
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Issue Date:
OSTI Identifier:
MSP Corporation CHO
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2016 Apr 21
Research Org:
MSP Corporation, Shoreview, MN (United States)
Sponsoring Org:
Country of Publication:
United States

Other works cited in this record:

Ionizing analysis apparatus
patent, August 1999

Method and apparatus for generating charged particles for deposition on a surface
patent, February 2011

Ionization method and apparatus using a probe, and analytical method and apparatus
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