Comparison of the electrochemical sensors developed for the detection of nitrite ions.

Sensing material	Detection range	Detection limit	Method of detection	Detection medium	Types of sample	Ref.
Poly(1,8-DAN)/f-MWCNT	0.3–6.5 μM	0.075 μM	Amperometry	0.1 M PBS + 0.1 M KCl	N/A	121
GO-CS-AuNPs/GCE	0.9–18.9 μM	0.3 μM	Amperometry	0.1 M PBS	N/A	122
Cu/MWCNT/RGO/GCE	0.1–75 μM	N/A	SWV	Na2SO4/H2SO4, pH 3	Water	51
MnTMPyP/NbWO6/GCE	0.12–3.57 mM	0.38 μM	DPV	PBS (pH 7)	N/A	101
CG/PPy/CS/GCE	0.2–1000 μM	0.02 μM	DPV	0.1 M NaAc-HAc buffer (pH 4)	Tap/commercial/salt/soybean milk water	100
α-MnO2- based electrode	10–800 μM	0.5 μM	DPV	0.1 M PBS	N/A	123
GNPs/graphene/MCE electrode	0.3–720 μM	0.1 μM	DPV	0.1 M acetate buffer	Lake/river/industrial water/food	124
α-Fe2O3 NPs-ZnO NRs-Ag electrode	1–1250 μM	0.015 μM	LSV	0.1 M PBS	Tap/mineral/pond water	104
Cu-MOF/rGO/GCE	3 μM to 40 mM	33 nM	Chronoamperometry	0.1 M PBS	N/A	125
CuS-MWCNT/GCE	1 μM to 8.1 mM	0.33 μM	Amperometry	0.1 M PBS	Tap water	102
Pt/Ni(OH)2/MWCNTs/GCE	0.4 μM to 5.67 mM	0.13 μM	Amperometry	0.1 M PBS	Milk sample	126
Pt NWNs/GCE	1 μM to 24 mM/24–132 mM	0.14 μM	Chronoamperometry	0.1 M PBS	N/A	127
Ag/HNTs/MoS2/CPE	2–425 μM	0.7 μM	Amperometry	0.1 M PBS	Tap water/aqueduct water	106
AuNPs/CS@N,S co-doped MWCNTs/GCE	1–7000 μM	0.2 μM	Amperometry	M PBS (pH 7.4)	Food	107
Pd/Fe3O4/poly DOPA/RGO	2.5–6470 μM	0.5 μM	Amperometry	0.1 M PBS	River water/food	128
Ag-AEfG100/GCE	0.05–3000 μM	0.023 μM	Amperometry	PBS (pH 7.4)	Tap water	108
Cu2O-CNTs/Au electrode	0.1 nM to 1 mM	0.0188 nM	EIS	5 mM K3[Fe(CN)6]/K4[Fe(CN)6} in PBS (pH 7.4)	Tap water	109
Nano-Au/P3MT/GCE	10–1000 μM	2.3 μM	Amperometry	PBS (pH 4.0)	Iodized salt	110
Bare GCE	N/A	0.4 μM	Amperometry	N/A	Aqueous	111
Au/GCE	10–5000 μM	2.4 μM	CV	0.2 M acetate buffer	Water	112
Cyt c/l-Cys/P3MT/MWCNT/GCE	10–100 μM	0.5 μM	Amperometry	0.1 M PBS	Aqueous	129
P-NiTAPc film-modified electrode	0.5–8000 μM	0.1 μM	Amperometry	H2SO4–Na2SO4 solution (pH 2.0)	Water	130
Ag-NEEs	10–300 μM	N/A	CV	0.1 M PBS	N/A	131
MC/GCE	0.5–100 μM	0.1 μM	DPV	BR-buffer (pH 3.5)	Water	132
Boron-doped diamond electrode	2–1000 μM	0.05 μM	CV	N/A	Aqueous	133
p-ATT/GCE	0.05–100	340 pM	Amperometry	0.2 M PBS	Water	134
VO(SB)-modified CPE	3.9–40 μM	0.613 μM	CV	0.1 M TBAP	N/A	135
AgZEGE	100–1000 μM	10 μM	Amperometry, CV	0.1 M Na2SO4	Water	71
Pt/poly(1,8-DAN)Pt/CA	0.5–100 μM	0.1 μM	Amperometry	Acetate buffer (pH 4)	Water/food/soil	115
CoPc modified electrode	N/A	0.005 μA	CV	PBS (pH 7.3)	N/A	116
CuNPs/CNTs/CS/GCE	0.1–2500 μM	0.024 μM	Amperometry	0.05 M PBS	N/A	136
CoL/MNSs/CPE	0.2–30 μM	0.015 μM	DPV	BR-buffer	Water	137
Cu/Ag/MWCNTs/GCE	1 μM to 1 mM	0.2 μM	Amperometry	PBS (pH 7)	Lake/drinking/sea water	138
AuNPs-PEI/CSPE	0.01–4 μM	0.0025 μM	DPV	PBS (pH 6.5)	Tap/cannel water	139
Snsubmicroparticles/GCE	5–1000 μM	0.5 μM	DPV	0.1 M PBS	N/A	140
Snsubmicroparticles/GCE	150–900 μM	10 μM	Amperometry	0.1 M PBS	N/A	140
Snsubmicroparticles/GCE	100–500 μM	50 μM	Impedance	0.1 M PBS	N/A	140