Application of coupled liquid chromatography-mass spectrometry in photolysis studies of the herbicide triflusulfuron-methyl.
The photochemical fate of the herbicide triflusulfuron-methyl in aqueous solution under UV light (lambda > 290 nm) was investigated. Nine photoproducts were detected and tentatively identified by LC/MS and LC/MS/MS analysis. The main routes of degradation involve the cleavage and/or contraction of the sulfonylurea bridge with the elimination of sulfur dioxide, which increases the acidity of the reaction medium. On the basis of the results obtained a photodegradation pathway is proposed.
Chafik
N
N
GSF-Forschungszentrum für Umwelt und Gesundheit, Institut für Okologische Chemie, Ingoldstädter Landstrasse 1, D-85764 Neuherberg, Germany.
Mansour
M
M
Elamrani
B
B
Schramm
K W
KW
Kettrup
A
A
Elamrani
M K
MK
D001565:Benzoates / Q000737:chemistry / Q000528:radiation effects*; D002853:Chromatography, Liquid; D006540:Herbicides / Q000737:chemistry / Q000528:radiation effects*; D006863:Hydrogen-Ion Concentration; D013058:Mass Spectrometry; D008956:Models, Chemical; D010782:Photolysis; D013458:Sulfur Dioxide / Q000378:metabolism; D014227:Triazines / Q000737:chemistry / Q000528:radiation effects*; D014466:Ultraviolet Rays
D001565:Benzoates; D006540:Herbicides; D014227:Triazines; D013458:Sulfur Dioxide; C413391:triflusulfuron-methyl