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Abstract
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A dispersive solid phase extraction method using new magnetic nanoparticles based on nickel ferrite was
introduced for the extraction of six triazole pesticides (penconazole, hexaconazole, tebuconazole, diniconazole,
triadimefon, and difenoconazole) from water samples before liquid chromatography-tandem mass spectrometry
analyses. Initially, a new deep eutectic solvent was synthesized with 1,2,4-triazole and n-octanol for surface
modification of the nanoparticles easily achieved through microwave radiation. The nanoparticles morphology,
magnetic properties, adsorption capacity, isotherms, and crystalline patterns of the sorbent were examined. The
capability of the sorbent was evaluated by extracting the target pesticides from water samples showing significant
differences in adsorption capacity and efficiency between the modified and non-modified nanoparticles.
High extraction recoveries (68–86 %) were achieved for the analytes using small amounts of the sorbent with low
limits of detection (0.03–0.08 ng mL 1) and quantification (0.13–0.29 ng mL 1), a wide linear range (0.29–250
ng mL 1), and acceptable precision (relative standard deviations ≤6.9 %).
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