Journal
FOOD CHEMISTRY
Volume 332, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2020.127427
Keywords
Magnetic porous framework; Magnetic solid phase extraction; Nitroimidazoles; Chicken meat; Determination
Funding
- National Natural Science Foundation of China [31471643, 31571925, 31671930]
- Natural Science Foundation of Hebei Province [B2016204136, B2017204025, B2020204001, C2020204020]
- Innovation Ability Training Program of the Department of Education of Hebei Province [CXZZSS2019060]
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A magnetic porous organic framework (M-POF) was rationally designed and served as a sorbent for magnetic solid-phase extraction of six nitroimidazoles from chicken meat prior to their assay by high-performance liquid chromatography with diode array detection. The M-POF exhibited good magnetic responsiveness and outstanding affinity to nitroimidazoles with large adsorption capacity up to 36 mg g(-1). Under optimal conditions, the developed method offered good linearity (r greater than 0.992) in the range of 1.5-100.0 ng g(-1), low limits of detection (S/N = 3) of 0.5-0.8 ng g(-1), low limits of quantification of 1.5-2.5 ng g(-1) and high enrichment factors of 80-175 for the nitroimidazoles. The method was successfully applied to analyze nitroimidazoles in chicken meat. The recoveries were 80.2-118% with relative standard deviations lower than 12%. The adsorption mechanism was further explored and the results showed that the M-POF exhibited adsorption potential for compounds with strong polar interactions.
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