Preparation of mesoporous ZrO2-coated magnetic microsphere and its application in the multi-residue analysis of pesticides and PCBs in fish by GC–MS/MS

A sensitive and efficient method for routine pesticide multiresidue analysis in bee pollen samples using gas and liquid chromatography coupled to tandem mass spectrometry

“…The zirconia surface can form coordinate complexes with a number of Lewis bases; this is because Zr atoms have vacant 3d orbitals and are thus able to accept electrons [36,37]. The competition between endogenous matrix compounds and pesticides could be responsible for the low recoveries of fluazifop (15%) which in water is rapidly hydrolyzed to fluazifop acid with a Lewis base donor group (R-COO − ) within its structure.…”

High‐throughput multipesticides residue analysis in earthworms by the improvement of purification method: Development and application of magnetic Fe3O4‐SiO2 nanoparticles based dispersive solid‐phase extraction

“…Earthworms are composed of proteins, fats, and carbohydrates. ZrO 2 was reported to be effective for adsorbing both fatty acids and proteins owing to the Lewis acid–base interaction and electrostatic interaction, because it is a transition‐metal oxide with amphoteric properties, acting as both an electron‐pair acceptor and donor . PSA is a weak anion‐exchange adsorbent that can remove fatty acids from the matrix .…”

“…Magnetic Fe 3 O 4 nanoparticles modified with 3‐( N , N ‐diethylamino)propyltrimethoxysilane have been synthesized and utilized as cleanup adsorbent to determine the multipesticides residue in vegetables, fruits, and grains . Regarding environmental organisms, there have been few reports describing pesticide residue analysis using magnetic adsorbents except for the fish sample . To the best of our knowledge, multipesticides residue in earthworms has not been previously studied based on magnetic d‐SPE.…”

QuEChERS extraction coupled to GC-MS for a fast determination of polychlorinated biphenyls in breast milk from Polish women

“…The crucial issue is to efficiently remove lipids because they reduce sensitivity and reproducibility of instrumental analysis (Baduel et al 2015). The QuEChERS method has also been applied to isolating PCBs from fish tissue (Chamkasem et al 2016; Han et al 2016; Morrison et al 2016; Norli et al 2011; Peng et al 2015), mussel (Madureira et al 2014), meat (Kuzukiran and Filazi 2016), and honey (Al-Alam et al 2017). As regards breast milk investigations, three papers were found in literature (Asamoah et al 2018; Baduel et al 2015; Luzardo et al 2013).…”