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Abstract: On-line solid-phase extraction method was developed by enrofloxacin-imprinted monolithic column (monolithic MW) coupling with reversed-phase high-performance liquid chromatography for preconcentration and separation of fluoroquinolone residues in milk. The monolithic MIP was prepared by in situ polymerization in a stainless-steel chromatographic column. An enrichment factor of 6.70 along with a good sample clean-up effect was obtained. High recoveries for three fluoroquinolones such as enrofloxacin, ciprofloxacin and norfloxacin wore achieved, which was in the range of 82.0-94.0 % with precision lower than 5.6 %. The limit of detection and limit of quantitation of the proposed method were in a range of 4.31-7.62 μg/kg and 14.37-25.40 μg/kg, respectively. The proposed method was successfully applied to on-line preconcentration, separation and determination of the fluoroquinolones in the milk sample
Template and target information: enrofloxacin, ciprofloxacin, norfloxacin
Author keywords: molecularly imprinted monolithic column, on-line, Solid-phase extraction, Enrofloxacin, milk