کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4414965 1307732 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrolytic degradation of azimsulfuron, a sulfonylurea herbicide
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Hydrolytic degradation of azimsulfuron, a sulfonylurea herbicide
چکیده انگلیسی

The chemical degradation of the herbicide azimsulfuron was investigated in aqueous solutions at different pH values. The hydrolysis rate, determined by HPLC analyses, was pH dependent and was much faster in acidic than in neutral or weakly basic conditions. The metabolites formed at different pH values were compared with standards when possible or isolated and identified using ESI-LC-MS/MS, 1H NMR and 13C NMR. The two main products of hydrolysis in mild acidic solution were identified as 2-amino-4,6-dimethoxy-pyrimidine and 2-methyl-4-(2-methyl-2H-tetrazol-5-yl)-2H-pyrazole-3-sulfonamide, both produced as a result of the sulfonylurea bridge cleavage. Under basic conditions, a new product, a substituted 2-pyrimidinamine, deriving from the contraction of the sulfonylurea bridge, was isolated and completely characterized for the first time.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 68, Issue 7, July 2007, Pages 1312–1317
نویسندگان
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