RT info:eu-repo/semantics/article
T1 An optimized extraction procedure for determining acaricide residues in foundation sheets of beeswax by using gas chromatography-mass spectrometry
A1 Nozal Nalda, María Jesús del
A1 Imaz Sánchez, Edgar
A1 Bernal Yagüe, José Luis
A1 Nieto, José Luis
A1 Higes Pascual, Mariano
A1 Bernal del Nozal, José
K1 Acaricides lemac
K1 Beeswax
K1 Química Analítica
K1 Gas chromatography
K1 Mass spectrometry
K1 Pesticides
K1 Pesticides - Toxicology
K1 Arthropoda
AB Pesticides can be found in beehives for several reasons, including contamination from surrounding cultivars; yet one of the most pertinent is related to the fact that beekeepers employ acaricides to control various types of mites, which may accumulate in beeswax due to their lipophilic nature. In the present study, foundation sheets of different origins, collected over a period of three years, were analyzed to detect the residues of seven acaricides (atrazine, chlorpyrifos, chlorfenvinphos, alpha-endosulfan, bromopropylate, coumaphos, tau-fluvalinate) by gas chromatography with mass spectrometric detection. An efficient sample treatment (recoveries between 90% and 108%) is proposed, involving solvent extraction with 1% acetic acid in acetonitrile mixture followed by dispersive solid-phase extraction (enhanced matrix removal lipid) and a polishing step. An evaluation was made of the analytical performance of the proposed method. It was shown to be selective, linear from a limit of quantification to 5000 µg/kg, precise (relative standard deviation values were below 6%), and with a goo sensitivity (limit of quantification ranging from 5 to 10 µg/kg). Finally, results showed that a large majority of the sheets analyzed (>90%) contained residues of at least one of these compounds. Coumaphos and tau-fluvalinate residues were the most common, with chlorpyrifos and chlorfenvinphos detected to a lesser extent.
PB MDPI
SN 2073-4395
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/59670
UL https://uvadoc.uva.es/handle/10324/59670
LA eng
NO Agronomy, 2021, Vol. 11, Nº. 4, 804
NO Producción Científica
DS UVaDOC
RD 07-ago-2024