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Electron avalanche desorption: A new soft-ionization technique for non-volatile and/or thermally labile molecules

1991; Wiley; Volume: 5; Issue: 1 Linguagem: Inglês

10.1002/rcm.1290050109

1097-0231

Roman A. Zubarev, Pavel V. Bondarenko, A. N. Knysh, B. V. Rozynov,

Analytical Chemistry and Chromatography

Abstract A new ionization technique based on a modification of the conventional plasma‐desorption mass spectrometric apparatus is described. An electron avalanche produced by the microchannel plates of a secondary electron multiplier is found to desorb a sufficient amount of (quasi‐)molecular ions of non‐volatile thermally labile molecules. Spectra of several substances with molecular masses up to 1250 u are presented. The mechanism of electron avalanche desorption is now under investigation.