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Laser Desorption Ionization of Melamine and Identification of Fragmentation Channels from Ion Velocity Distribution Measurements
Author(s) -
Han ChauChung,
Wang RuWen,
Lee TiehSheng
Publication year - 1998
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199800037
Subject(s) - chemistry , desorption , ionization , soft laser desorption , dissociation (chemistry) , ion , matrix assisted laser desorption electrospray ionization , laser , atmospheric pressure laser ionization , analytical chemistry (journal) , fragmentation (computing) , melamine , ambient ionization , ion source , mass spectrometry , atomic physics , electron ionization , matrix assisted laser desorption/ionization , chromatography , optics , adsorption , organic chemistry , physics , computer science , operating system
Abstract Fragmentation frequently accompanies intact laser desorption ionization of a parent non‐volatile compound, desorption and dissociation dynamics has been a subject of intense studies over the past decade. As a preliminary lest system for future laser desorption study of energetic compounds such as explosives and propellents, we studied UV laser desorption ionization of melamine at a laser power density of approximately 4.4 MW/cm 2 . Several gas‐phase dissociation channels of the parent and fragment ions formed in UV laser desorption ionization of melamine films can be identified from their velocity distributions. A phenomenological desorption temperature of the order of 20000 K is estimated from fitting the experimental velocity distributions to Maxwellian functions.