RT Journal Article T1 The ultratrace determination of fluoroquinolones in river water samples by an online solid-phase extraction method using a molecularly imprinted polymer as a selective sorbent A1 Baeza, Ana A1 Urriza-Arsuaga, Idoia A1 Navarro Villoslada, Fernando A1 Urraca Ruiz, Javier AB Fluoroquinolones (FQs) are broad-spectrum antibiotics widely used to treat animal and human infections. The use of FQs in these activities has increased the presence of antibiotics in wastewater and food, triggering antimicrobial resistance, which has severe consequences for human health. The detection of antibiotics residues in water and food samples has attracted much attention. Herein, we report the development of a highly sensitive online solid-phase extraction methodology based on a selective molecularly imprinted polymer (MIP) and fluorescent detection (HPLC-FLD) for the determination of FQs in water at low ng L−1 level concentration. Under the optimal conditions, good linearity was obtained ranging from 0.7 to 666 ng L−1 for 7 FQs, achieving limits of detection (LOD) in the low ng L−1 level and excellent precision. Recoveries ranged between 54 and 118% (RSD < 17%) for all the FQs tested. The method was applied to determining FQs in river water. These results demonstrated that the developed method is highly sensitive and selective. PB MDPI SN 1420-3049 YR 2022 FD 2022 LK https://hdl.handle.net/20.500.14352/91811 UL https://hdl.handle.net/20.500.14352/91811 LA eng NO Baeza, A.N.; UrrizaArsuaga, I.; Navarro-Villoslada, F.; Urraca, J.L. The Ultratrace Determination of Fluoroquinolones in River Water Samples by an Online Solid-Phase Extraction Method Using a Molecularly Imprinted Polymer as a Selective Sorbent. Molecules 2022, 27, 8120. https://doi.org/10.3390/ molecules27238120 NO Ministerio de Economía y Competitividad (España) DS Docta Complutense RD 17 abr 2025