Degradation of imazalil, orthophenylphenol and pyrimethanil in Clementine mandarins under conventional postharvest industrial conditions at 4 C

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Título

Degradation of imazalil, orthophenylphenol and pyrimethanil in Clementine mandarins under conventional postharvest industrial conditions at 4 C

Tema

CITRUS
FUNGICIDAS
DEGRADACION DE FUNGICIDAS
BIBLIOGRAFIA NACIONAL QUIMICA
2016

Abstract

The degradation of the postharvest fungicides imazalil, orthophenylphenol, and pyrimethanil was studied
on Clementine mandarins during packinghouse storage for a 28 day period at 4 C. Fruits to which
orthophenylphenol was applied, were treated with imazalil and pyrimethanil at doses of 1000 and
2000 mg L1, using cascade application for the later and cascade and wax for the former. The decay of
the three fungicides was evaluated using an in-house validated analytical procedure that includes the
extraction and dispersive clean up of the samples followed by the GC–MS determination of the pesticide
residues. The impact of fruit storage time on pesticide residues concentration was assessed. The residues
found for the different application technologies were always below the established Maximum Residue
Limits by the Codex Alimentarius and the European Union (5 mg kg1 for imazalil, 7 and 8 mg kg1 for
pyrimethanil, and 10 mg kg1 and 5 mg kg1 for orthophenylphenol). The fungicides dissipated differentially.
Pyrimethanil showed little degradation, if any, at both tested concentrations, but the half-life of
imazalil on the fruit was 15–18 days, independent of the application technology. Orthophenylphenol
dissipated with a half-life of 15 days. The initial imazalil residue found after cascade treatment was
not significantly different between the doses studied (p < 0.5), whereas when the fungicide was included
in wax as an emulsifiable concentrate the initial and final imazalil residues were significantly different.
Final residue levels after 28 days of storage were 0.12–0.24 mg kg1 for imazalil, 0.68 mg kg1 for
2-phenylphenol and 0.56 mg kg1 for pyrimethanil for all the evaluated treatments

Autor

Besil, Natalia
Varela, Pablo
Rivas, Fernando

Fuente

Food Chemistry v. 194, 2016. -- p. 1132-1137

Editor

Elsevier

Fecha

2016

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PDF

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Inglés

Tipo

Artículo

Identificador

http://dx.doi.org/10.1016/j.foodchem.2015.08.111

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Original Format

PDF
Fecha de agregación
May 4, 2016
Colección
Bibliografía Nacional Química
Tipo de Elemento
Document
Etiquetas
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Citación
Besil, Natalia, “Degradation of imazalil, orthophenylphenol and pyrimethanil in Clementine mandarins under conventional postharvest industrial conditions at 4 C,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed December 14, 2019, http://riquim.fq.edu.uy/items/show/3936.
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