Electrode Methods Linear range Detection limit(mol L-1) Reference SiO2/C/Nb2O5 DPV 3.98 × 10-5-9.8 × 10-4 0.8 × 10-6 [37] Au/L-lysine/OMC-Au/Tyr/GCE DPV 4.0 × 10-7-8.0 × 10-5 2.5 × 10-8 [32] Tyr/CoPc/CGCE i-t 3.0 × 10-6-8.63 × 10-4 4.5 × 10-7 [38] CoHCF/Au/SBA-15/GCE i-t 3.0 × 10-7-5.10 × 10-5 5 × 10-8 This work

Table 1: Comparison of the determination of catechol by different sensing methods.