Table 6. Electrocatalytic Determination of CC, HQ, and RC at Various Modified Electrodes.

	linear range μM					LOD μM
electrode	method	CC	HQ	RC	CC	HQ	RC	references
grapheneoxide dopedpoly(3,4-ethylenedioxythiophene)/GCE	DPV	2–400	2.5–200		1.6	1.6		(27)
poly(diallyldimethylammonium chloride) functionalizedgraphene/GCE	DPV	1–400	1–500		0.25	0.2		(30)
MWCNTs-PDDA-GR	DPV	0.5–400	0.5–400		0.0018	0.002		(31)
poly(3,4-ethylenedioxythiophene)/AuE	CV	0.091–98	0.1–49		0.0009	0.0001		(32)
graphene doped CILE	DPV	10–300	10–400	1–170	0.7	1.8	0.4	(33)
PANI/MnO2	DPV	0.2–100	0.2–100	0.2–100	0.16	0.13	0.09	(34)
graphene–chitosan/GCE	DPV	1–550	1–400	1–300	0.75	0.75	0.75	(35)
pEDOT/DGNs/GCE	CV	5–100	5–200	5–100	0.9	1.4	1.4	(36)
ZIF-8/CNF/GCE		2–400	2–400	2–400	0.06	0.08	0.32	(37)
poly(direct yellow 11)/MPGE	DPV	50–350	50–350		0.11	0.16		(38)
KOH-activatedGSEC film	SWV	0.5–200	0.5–200	0.5–200	0.1	0.1	0.5	(39)
NDSBAC/GCE	DPV	0.5–300	0.5–300		0.11	0.09		(40)
p-1,5-DAN/GC	SWV	0.1–100	0.1–100	0.1–100	0.059	0.034	0.14	(13)
PdDAN/GCEa	SWV	50–1000	50–1000	50–1000	0.227 nM	0.222 nM	0.477 nM	this work

^aIn 5.0 mM HClO₄.