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High‐performance liquid chromatographic mass spectrometric identification of the photoproducts of cymoxanil
Author(s) -
Morrica Patrizia,
Fidente Paola,
Seccia Serenella
Publication year - 2005
Publication title -
biomedical chromatography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 65
eISSN - 1099-0801
pISSN - 0269-3879
DOI - 10.1002/bmc.471
Subject(s) - chemistry , acetamide , high performance liquid chromatography , chromatography , aqueous solution , photodissociation , degradation (telecommunications) , mass spectrometry , photochemistry , organic chemistry , telecommunications , computer science
The photochemical degradation of the fungicide cymoxanil {2‐cyano‐ N ‐[(ethylamino)carbonyl]‐2‐(methoxyimino) acetamide} was studied in aqueous buffer solution (pH 5.9 ± 0.1) under UV light and in laboratory conditions. The degradation followed a pseudo‐rst‐order kinetic with signicant correlation coefcient. The main photoproducts were separated and tentatively identied by HPLC/UV and HPLC/MS data, as 3‐ethyl‐4‐(methoxyamino)‐2,5‐dioxo‐4‐imidazolidinecarbonitrile, 1‐ethyl‐5‐(methoxyimino)‐2,4‐imidazolidin‐2,4‐dione, ethylimidazolidinetrione and {[(ethylamino)carbonyl]‐amino}oxoacetic acid. A photolysis pathway of cymoxanil is proposed. Copyright © 2005 John Wiley & Sons, Ltd.