Journal
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
Volume 325, Issue -, Pages 167-171Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijms.2012.06.017
Keywords
Doppler anemometry; Droplet sizes; Conejet; Electrosprays; Ambient ionization; Ion evaporation; Field ionization
Funding
- National Science Foundation Instrumentation Development for Biological Research [DBI 0852740]
- Alfred Mann Institute for Biomedical Development at Purdue
- Direct For Biological Sciences
- Div Of Biological Infrastructure [0852740] Funding Source: National Science Foundation
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [0848650] Funding Source: National Science Foundation
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Images and droplet size measurements show that paper spray operates in two distinct spray modes. Mode 1 occurs in solvent-rich systems in which multiple Taylor conejets are created producing droplets of a range of sizes. Mode 2 occurs at low solvent flow rates and the higher currents (similar to 1 uA) suggest a contribution from corona discharge. The latter experiment produces monodispersed droplet sizes. A distinguishing feature of paper spray in both modes is a fixed droplet velocity independent of droplet size. (C) 2012 Elsevier B.V. All rights reserved.
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