Table 1.

Comparison of analytical performance of PVP-GR/GCE with other modified electrodes in the literature

Modified electrode	Technique	Linear range/μM			Detection limit/μM			Reference
		AA	DA	UA	AA	DA	UA
Pd/CNF-CPEa	DPVi	50–4000	0.5–160	2.0–200	15.0	0.20	0.70	[11]
PGE-DAb	DPV	25–500	1.0–20	2.5–30	13.0	0.11	1.40	[12]
MCNT/CCEc	DPV	15–800	0.5–100	0.55–90	7.71	0.31	0.42	[13]
PrGO/MnO2/CCEd	DPV	1–800	0.03–45	0.3–80	1.00	0.02	0.05	[20]
AuNPs-β-CD–GR/GCEe	SWVj	30–2000	0.50–150	0.5–60	10	0.15	0.21	[21]
SGNF/IL/CS/GCEf	DPV	30–350	0.05–240	0.12–260	14.8	0.04	0.10	[22]
GR-Pt/GCEg	Amperometry	0.15–34.4	0.03–8.13	0.05–11.85	0.15	0.03	0.05	[23]
Trp-GR/GCEh	DPV	200–12900	0.5–110	10–1000	10.09	0.29	1.24	[24]
PVP-GR/GCE	SDLSV	4.0–1000	0.02–0.2; 0.2–100	0.04–1.0; 1.0–100	0.8	0.002	0.02	This work

^aPalladium nanoparticle-loaded carbon nanofibers modified carbon paste electrode

^bPyrolytic graphite electrode modified into dopamine solution

^cMWCNT modified carbon-ceramic electrode

^dPoly(3,4-ethylenedioxythiophene)/reduced graphene oxide/manganese dioxide modified glassy carbon electrode

^eGold nanoparticles-β-cyclodextrin-graphene-modified electrode

^fStacked graphene platelet nanofibers/ionic liquids/chitosan modified glassy carbon electrode

^gGraphene/size-selected Pt nanocomposites modified glassy carbon electrode

^hTryptophan functionalized graphene modified glassy carbon electrode

ⁱDifferential pulse voltammetry

^jSquare wave voltammetry