Premium
GC‐MS n and LC‐MS/MS couplings for the identification of degradation products resulting from the ozonation treatment of Acetochlor
Author(s) -
Bouchonnet Stéphane,
Bourcier Sophie,
Souissi Yasmine,
Genty Christophe,
Sablier Michel,
Roche Pascal,
Boireau Véronique,
Ingrand Valérie
Publication year - 2012
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/jms.2056
Subject(s) - chemistry , acetochlor , degradation (telecommunications) , mass spectrometry , chromatography , effluent , high performance liquid chromatography , electrospray , pesticide , waste management , telecommunications , computer science , agronomy , biology , engineering
The degradation of the chloracetamide herbicide acetochlor has been studied under simulated ozonation treatment plant conditions. The degradation of acetochlor included the formation of several degradation products that were identified using GC/ion‐trap mass spectrometry with EI and CI and HPLC/electrospray‐QqTOF mass spectrometry. Thirteen ozonation products of acetochlor have been identified. Ozonation of the deuterated herbicide combined to MS n and high‐resolution mass measurement allowed effective characterization of the degradation products. At the exception of one of them, the product B (2‐chloro‐2', ethyl‐6', methyl‐acetanilide), none of the identified degradation products has been already reported in the literature. Post‐ozonation kinetics studies revealed that the concentrations of most degradation products evolved noticeably with time, particularly during the first hours following the ozonation treatment. This raises concerns about the fate of degradation products in the effluents of treatment plants and suggests the need for a better control on these products if their toxicity was demonstrated. Copyright © 2012 John Wiley & Sons, Ltd.