Table 1.

Comparison of several biosensors with the proposed biosensor for detecting NO₂⁻.

Biosensors	Linear Range (μM)	Detection Limit (µM)	References
GO-CS-AuNPs/GCE	0.9–18.9	0.3	This study
Pd/RGO/GCE	1–1000	0.23	[22]
Ag/HNTs/MoS2-CPE	2–425	0.7	[33]
Hb/Au/GACS/GCE	0.05–1000	0.01	[24]
NGE/PdNC/GCE	0.5–1510	0.11	[2]
CR-GO/GCE	8.9–167	1	[34]
Co3O4/RGO/GCE	1–380	0.14	[30]
AgNP/GC	10–1000	1.2	[37]
GNPs/MWCPE	0.05–250.0	0.01	[31]
Cu-NDs/RGO/GCE	1.25–13,000	0.4	[35]
Ag-PAMAM nanocomposite/GCE	4–1400	0.4	[36]
Au-Fe(III) nanoparticle/GCE	0.3–150	0.2	[32]
poly(o-anisidine) ionic liquid carbon paste electrode	2–50	1.05	[38]