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Characterization of carbofuran photodegradation by‐products by liquid chromatography/hybrid quadrupole time‐of‐flight mass spectrometry
Author(s) -
Detomaso Antonia,
Mascolo Giuseppe,
Lopez Antonio
Publication year - 2005
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.2036
Subject(s) - chemistry , mass spectrometry , photodegradation , tandem mass spectrometry , fragmentation (computing) , electrospray , analytical chemistry (journal) , chromatography , organic chemistry , photocatalysis , computer science , operating system , catalysis
Abstract An Erratum has been published for this article in Rapid Communications in Mass Spectrometry 19(17) 2005, 2480. The structural elucidation of by‐products arising from carbofuran photodegradation using a high‐pressure UV lamp has been investigated by liquid chromatography/electrospray ionization tandem mass spectrometry (LC/ESI‐MS/MS) employing a quadrupole time‐of‐flight mass spectrometer. Exact mass measurements of the [M + H] + ions of the by‐products and of product ions allowed the elemental formulae and related structures of seven photodegradation by‐products (resulting, respectively, from photo‐Fries rearrangement, hydroxylation of the benzene ring, oxidation of the 2,3‐dihydrobenzofuran ring, cleavage of the carbamate group, hydrolysis of the ether group and the newly observed radical coupling and decarboxylation processes) to be determined confidently. Accurate mass measurements of product ions allowed ambiguities to be removed concerning neutral losses having the same nominal mass, namely CO and C 2 H 4 , allowing the fragmentation patterns to be rationalized. Copyright © 2005 John Wiley & Sons, Ltd.