A technique for producing ions for mass spectrometry, used especially for obtaining ions from large molecules. The sample is dissolved in a volatile solvent, which may also contain volatile acids or bases so that the sample exists in an ionic form. The solution is forced through a charged metal capillary tube and forms an aerosol. Evaporation of the solvent results in single ions of the sample, which are analysed by the mass spectrometer.
Subjects: Chemistry — Physics.