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On the formation of negative ions in atmospheric pressure photoionization conditions

✍ Scribed by Elisa Basso; Ester Marotta; Roberta Seraglia; Michela Tubaro; Pietro Traldi

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
95 KB
Volume
38
Category
Article
ISSN
1076-5174

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✦ Synopsis

On the formation of negative ions in atmospheric pressure photoionization conditions Atmospheric pressure photoionization (APPI) 1 is a new technique, highly interesting for its features, mainly selectivity and sensitivity, somehow overlapping the performances of the well-established electrospray (ESI) 2 and atmospheric pressure chemical ionization (APCI) 3 techniques. The basic principle of this method is, at first sight, very simple: a molecule M can be ionized by interaction with a photon beam only if its ionization energy (IE) is lower, or equal to, the photon energy h :

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