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  1. Figures

  2. Fig. 1 Schematic of a lab-built drop-type chemiluminescence (DCL) system

  3. Fig.2 Sample treatment procedure for DCL measurement to determine enrofloxacin and its metabolite in chicken meat EDC/NHS Amide bond BSA BSA NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 NH2 H2N H2N H2N H2N H2N BSA BSA BSA BSA Amide bond NH2 Amide bond BSA BSA BSA BSA HRP HRP BSA BSA Amide bond BSA BSA

  4. Fig.3 EF-TEM image of synthesized and surface modified magnetic nanoparticles (amine-functionalized SiO2@Fe3O4 nanoparticles); core 10.5±1.7 nm, shell 16.3±1.2nm

  5. Fig.4 (a)FT-IR spectrum of amine functionalized SiO2@Fe3O4 nanoparticles; silica and NH2 group functionalized MNP

  6. Fig.4 (b) FT-IR spectrum of amine functionalized SiO2@Fe3O4nanoparticles;enrofloxacinattached MNP.

  7. Supplementary DATA

  8. S-fig. 1. Experimental procedure for ELISA Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Secondary antibody (HRP) Primary antibody Substrate (TMB) Enrofloxacin

  9. S-fig. 2. Calibration curve of Enrofloxacin in chicken sample

  10. S-fig 3. Calibration curve of Ciprofloxacin in chicken sample

  11. S-fig. 4. Calibration curves of Enrofloxacin and Ciprofloxacin in chicken using ELISA