“…Yu et al, 2019), dual-template molecularly imprinted polymer-stir bar sorptive extraction (DMI-SBSE; K. , DLLME (Moghadam et al, 2018) and hollow fiber-supported liquid membrane (Gaolape, 2017) have been used as purification and enrichment step before their quantification in meat samples. For this purpose, the use of LC with UV (Aziz Abdel et al, 2017;Moghadam et al, 2018;Sun et al, 2016;Wang et al, 2018;, FLD (Bozkurt et al, 2016;Peris-Vicente et al, 2017, 2019Terrado-Campos et al, 2017) or LC coupled to MS/MS detection (Barreto et al, 2017;Chung et al, 2018;Gaolape, 2017;Hyung et al, 2017;Lu et al, 2019;Pugajeva et al, 2018;Wen et al, 2020; H. Yu et al, 2019) have been described. However, others F I G U R E 5 Schematic fabrication process of Fe 3 O 4 @COF(TpBD)@Au-MPS and the MSPE procedure for the determination of FQs (reproduced with permission from Wen et al, 2020) Abbreviations: BD, benzidine; COF, covalent organic framework; FQs, fluoroquinolones; MPS, 3-mercaptopropanesulfonate; MSPE, magnetic solid phase extraction; NPs, nanoparticles; Tp, 1,3,5-triformylphloroglucinol methods based on UV-Vis (Rasheed et al, 2017), biochips (Ha et al, 2016) and fluorescence detection (Chaowana & Bunkoed, 2019;Pagani & Ibañez, 2019) have been also employed.…”