Photodegradation of the carbamate insecticide pirimicarb
- 1 September 1993
- journal article
- Published by Springer Nature in Zeitschrift für Lebensmittel-Untersuchung und Forschung
- Vol. 197 (3) , 264-268
- https://doi.org/10.1007/bf01185283
Abstract
Zur Untersuchung des photochemischen Verhaltens von Pirimicarb auf Pflanzenoberflächen wurden Modellexperimente mit organischen Lösungsmitteln durchgeführt. Die Bestrahlung (λ>280 nm) von Pirimicarb in den ausgewählten Modellösungsmitteln führte zu einem raschen Abbau unter Bildung zahlreicher Produkte. Die Halbwertszeit für den Photoabbau in den einzelnen Lösungsmitteln stieg in der Reihenfolge IsopropanolN-formylpirimicarb and, in a second step, toN-desmethylpirimicarb as well as to further oxygenated products with the carbamate moiety intact. Photolysis in cyclohexene resulted in photomi-neralisation as the main degradation pathway. Irradiation of pirimicarb in the presence of isopropanol also yielded an addition product of the parent compound with the secondary alcohol.Keywords
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