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Published December 25, 2003 | public
Journal Article Metadata-only

Field-Induced Droplet Ionization Mass Spectrometry

Grimm, Ronald L. ORCID icon
Beauchamp, J. L. ORCID icon
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Abstract

A neutral droplet elongates along the axis of a strong electric field, ejecting opposing jets of positively and negatively charged progeny droplets. Images of droplets from a vibrating orifice aerosol generator illustrate this phenomenon, and mass spectrometric sampling of the progeny droplets demonstrates that they are a viable source of desolvated gas-phase ions. Field-induced droplet ionization (FIDI) mass spectra are presented for several species, including tetraheptylammonium cation, deprotonated benzene tetracarboxylic acid anion, and multiply protonated cytochrome c.

Additional Information

© 2003 American Chemical Society. Received: October 13, 2003; In Final Form: November 6, 2003. Publication Date (Web): November 27, 2003. The authors gratefully acknowledge Drs. Nathan Dalleska and Mona Shahgholi for the assistance with and use of their mass spectrometry facilities. The Beckman Institute at Caltech has provided facilities and financial support for these investigations. Studies of droplet evaporation and discharge processes associated with ESI have been supported by NSF Grant CHE-9727566.

Additional details

Identifiers Funding Dates
Created:
August 19, 2023
Modified:
October 25, 2023