J. Phys. Colloques
Volume 48, Numéro C6, Novembre 198734th International Field Emission Symposium / 34ème Symposium International d'Emission de Champ
|Page(s)||C6-253 - C6-256|
J. Phys. Colloques 48 (1987) C6-253-C6-256
FIELD ION EMISSION FROM LIQUID SOLUTIONS : ION EVAPORATION AGAINST ELECTROHYDRODYNAMIC DISINTEGRATIONF.W. Röllgen, E. Bramer-Weger et L. Bütfering
Institute of Physical Chemistry, University of Bonn, Wegelerstr. 12, D-5300 Bonn, F.R.G.
In several ionization techniques currently applied in organic mass spectrometry a mechanism of field induced ion evaporation from charged droplets is assumed to play a dominant role in the desolvation of ions from liquids. This ion evaporation mechanism is briefly discussed regarding its competition with electrohydrodynamic disintegration of the surface of the liquid droplet under field stress. It is shown that ion evaporation is unlikely to occur for most solute/solvent systems and of no significance in the formation of gaseous ions. In contrast electro-hydrodynamic disintegration processes can contribute to the desolvation of ions from charged droplets.