Investigation of the photochemical behaviour of pyrethroids lacking the cyclopropane ring by photo-solid-phase microextraction and gas chromatography/mass spectrometry.
Maria Fernandez-Alvarez, Maria Llompart, Carmen Garcia-Jares, Thierry Dagnac, Marta Lores
Index: Rapid Commun. Mass Spectrom. 23(23) , 3673-87, (2009)
Full Text: HTML
Abstract
The characterization of by-products arising from the UV photodegradation of two insecticide pyrethroids lacking the cyclopropane ring (flucythrinate and fenvalerate) has been investigated by gas chromatography coupled with mass spectrometry (GC/MS). Twenty photoproducts were tentatively identified mainly based on the interpretation of the experimental mass spectra or by using reference mass spectra. Some of these compounds had not previously been detected. Furthermore, the generation of some of the photoproducts might be a matter for concern due to their potential toxicity. The corresponding photodegradation routes, including postulation of the intermediate radicals, have also been proposed. These photodegradation studies were performed by photo-solid-phase microextraction (photo-SPME) in which the SPME fibre was exposed to light after extraction of the target analytes from aqueous solutions. The degradation kinetics of the investigated pyrethroids and the photoformation-photodegradation curves of the photoproducts generated in situ were also monitored through the ion chromatograms obtained for different irradiation times and the corresponding mass spectra.Copyright 2009 John Wiley & Sons, Ltd.
Related Compounds
Related Articles:
1980-10-01
[Bull. Environ. Contam. Toxicol. 25(4) , 608-15, (1980)]
Comparison of dislodgable and total residues of three pyrethroids applied to cotton in Arizona.
1990-02-01
[Bull. Environ. Contam. Toxicol. 44(2) , 240-5, (1990)]
[Effectiveness of a PVC ear tag impregnated with the insecticide flucythrinate].
1987-04-01
[Tijdschr. Diergeneeskd. 112(7) , 396-400, (1987)]
1993-12-01
[Carcinogenesis 14(12) , 2531-5, (1993)]
Variation in cutaneous sensation between synthetic pyrethroid insecticides.
1985-09-01
[Contact Dermatitis 13(3) , 140-7, (1985)]