Co-Authors:
Rejto, M., Division of Soil Residues Chemistry, Institute of Soils and Water, Volcani Center, Bet Dagan, Israel
Saltzman, S., Division of Soil Residues Chemistry, Institute of Soils and Water, Volcani Center, Bet Dagan, Israel
Acher, A.J., Division of Soil Residues Chemistry, Institute of Soils and Water, Volcani Center, Bet Dagan, Israel
Muszkat, L., Division of Pesticide Residues, Institute of Plant Protection, ARO, Volcani Center, Bet Dagan, Israel
Abstract:
The dye-sensitized photodecomposition of s-triazine derivatives, commonly used as herbicides, has been studied. Aqueous, aerated solutions of these herbicides (ametryne, atraton, and atrazine), containing a sensitizer (riboflavin), were exposed to sunlight irradiation for several hours. The primary photodegradation products formed were the deethylated s-triazines (a) and the oxidated product, 6-acet-amido-s-triazines (b). The yields of these products were for compounds a 55%, 62%, and 70% and for compounds b 2.6%, 3.0%, and 7.0% for the above herbicides, respectively. Further irradiation of the reaction mixtures led to the decomposition of compounds a and b with the formation of 4,6-diamino-s-triazine derivatives (c) which eventually photolyzed to unidentified compounds. The techniques used for isolation and identification of the above products were a combination of column chromatography, gas chromatography, and proton nuclear magnetic resonance, infrared, and mass spectrometry. © 1983, American Chemical Society. All rights reserved.
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ניגודיות עדינה
מונוכרום
הדגשת קישורים
חסימת אנימציה
פונט קריא
סגור
איפוס הגדרות נגישות
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