2026-05-05T18:45:54Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/636562025-02-18T11:25:51Zcom_10324_28542com_10324_952com_10324_894col_10324_28543

00925njm 22002777a 4500 dc De La Fuente Ballesteros, Adrián author Jano, Ana author Bernal del Nozal, José author Ares Sacristán, Ana María author 2024 We propose a new analytical methodology to determine seven pesticides (atrazine, chlorpyrifos, chlorfenvinphos, α-endosulfan, bromopropylate, coumaphos, and τ-fluvalinate) in royal jelly and propolis products using gas chromatography-mass spectrometry. Sample treatment, with minor modifications for propolis, consisted of a solvent extraction with a hexane and isopropanol mixture, and a further clean-up step. Meanwhile, chromatographic analysis (<25 min) was performed in a DB-5MS column under programmed temperature conditions. In all cases we validated the method in terms of selectivity, limits of detection (0.1–2.8 μg kg−1) and quantification (0.3–9.2 μg kg−1), linearity, matrix effect (<±20 %), trueness (recoveries between 93 % and 118 %), and precision (relative standard deviation < 11 %). All royal jelly liquid dietary supplements were positive for chlorfenvinphos and, in the case of one of them, for α-endosulfan; chlorfenvinphos was determined in some fresh royal jelly samples, and no pesticide residues were detected in the propolis samples analysed Food Chemistry, 2024, vol. 437, Part 2, 137911 0308-8146 https://uvadoc.uva.es/handle/10324/63656 10.1016/j.foodchem.2023.137911 137911 Food Chemistry 437 Alimentos - Análisis Pesticidas Development and validation of an analytical methodology based on solvent extraction and gas chromatography for determining pesticides in royal jelly and propolis