. 2023 Oct 14;9(10):e21033. doi: 10.1016/j.heliyon.2023.e21033

Table 2.

Comparison of the LOD and the linear range of Trp determined at various electrodes.

Electrode	LOD (μM)	Linear range (μM)	Method	Ref.
Poly(glycine) modified carbon nanotube paste electrode	0.42	20–100	DPV	[45]
Nitrogen-doped ordered mesoporous carbon/GCE	0.035	0.5–70 & 70–200	CV	[46]
Nanoporous carbon/GCE	0.03	1–103	Amperometry	[47]
NiO/carbon nanotube (CNT)/poly(3,4-ethylenedioxythiophene)/GCE	0.21	1–41	DPV	[48]
Polyvinylpyrrolidone coated gold nanoparticles modified GCE	0.3	1–50 & 50–350	LSV	[49]
Co₃O₄ nanosheets/rGO composites/GCE	0.26	1–800		[50]
Graphite electrode from waste batteries	1.73	5–150	DPV	[51]
Reduced graphene oxide with SnO₂ nanoparticles/GCE	0.04	1–100	DPV	[52]
Graphene-Modified Electrode	0.3	0.1–100	LSV	[53]
g-C₃N₄-CPE	0.085	0.1–120	LSV	This work

SWV - Square wave voltammetry; DPV - Differential wave Voltammetry.