title: Determination of two phototransformation products of bentazone using quadrupole time-of-flight mass spectrometry.
abstract: The transformation products 2-(isopropylcarbamoyl)phenylsulfamic acid and 2-(1-hydroxypropane-2-yl)-1,2-dihydroindazol-3-one could be determined during the photolysis of the herbicide bentazone. Degradation experiments were carried out with different types of water in a natural sunlight simulating system. Besides the anticipated hydroxylated bentazone, the second transformation product was identified by means of exact mass measurement using ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometry (UPLC/QqToF MS). Both phototransformation products occurred in all water types tested. The required irradiation time was matrix dependent. 2-(Isopropylcarbamoyl)phenylsulfamic acid was detected in a drainage channel in the Ebro river delta (Catalonia, Spain).
authors.affiliation: Europa University of Applied Sciences, Limburger Strasse 2, Idstein, Germany.
authors.forename: Manuela
authors.initials: M
authors.lastname: Peschka
authors.forename: Mira
authors.initials: M
authors.lastname: Petrovic
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Knepper
authors.forename: Damià
authors.initials: D
authors.lastname: Barceló
mesh_terms: D001581:Benzothiadiazines / Q000032:analysis*; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D002845:Chromatography / Q000379:methods; D002853:Chromatography, Liquid; D006540:Herbicides / Q000032:analysis; D007477:Ions; D008027:Light; D013058:Mass Spectrometry / Q000379:methods*; D008956:Models, Chemical; D010777:Photochemistry / Q000379:methods*; D010782:Photolysis; D021241:Spectrometry, Mass, Electrospray Ionization; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D001581:Benzothiadiazines; D006540:Herbicides; D007477:Ions; D014867:Water; C002003:bentazone