Electrochemical Investigation of Catechol at Poly(niacinamide) Modified Carbon Paste Electrode: A Voltammetric Study

Table 1

Comparison of linear range and detection limits for catechol with different classical methods and electrodes.

Classical methods	Electrode/modifier biosensors	Detection limits (µM)	Detection Potential (V)	Refs.
DPV	Bare indium tin oxide electrode	1.0	0.26	[9]
DPV	DL-norvaline modified GCE	0.8	0.37	[11]
DPV	[Cu(Sal-β-Ala)(3,5-DMPz)2]/SWCNTs/GCE	1.46	0.07	[26]
DPV	GCE/with a composite consisting of silver nanoparticles (AgNPs), polydopamine, and graphene	0.1	—	[27]
DPV	PASA/MWNTs composite film modified GCE	1.0	—	[28]
CV	Poly-NA modified CPE	1.49	0.20	Present work

DPV: differential pulse voltammetry; CV: cyclic voltammetry; GCE: glassy carbon electrode; Sal: salicylaldehyde; β-Ala: β-alanine; 3,5-DMPz: 3,5-dimethylpyrazole: SWCNTs: single-walled carbon nanotubes; PASA/MWNTs: polyamidosulfonic acid and multiwall carbon nanotubes.