The sensor records electrochemical response in the chicken liver spiked with colistin with CV.  The lower LOD was 0.89 μgKg-1, with a R 2 of 0.901 using CV.  The fabricated immunosensor showed high specificity towards colistin, which remained stable for 6 months but with a 13% loss in the initial CV current.
CV
Additionally, the characterization of electrode surface was done with FE-SEM, FTIR, and EIS at each step of fabrication. 
FE-SEM
Additionally, the characterization of electrode surface was done with FE-SEM, FTIR, and EIS at each step of fabrication. 
FTIR
Additionally, the characterization of electrode surface was done with FE-SEM, FTIR, and EIS at each step of fabrication. 
EIS