Fig. 6
a CV curves of the first three electrodes: bare SPCE, SnS2/SPCE, and β-CD/SnS2/SPCE in the electrolyte containing a mixture of 3 mM yellow blood salt, 3 mM red blood salt, 0.1 M KCl solution, and other β-CD/SnS2/SPCE in an electrolyte containing PCBs (Aroclor 1016) potential window from − 0.6 to 1.0 V with a scanning rate of 0.05 V/s. b CVs of different scan-rate analysis (0.01 V/s to 0.1 V/s) was carried out in 80 μM PCBs (Aroclor 1016) in mixed solution of 3 mM yellow blood salt, 3 mM red blood salt, and 0.1 M KCl. c The calibration plot depicts the square root of the scan rate versus current density of the anodic and cathodic peak