Table 1.

A comparison of the sensing performance between NH₂–Fe₃O₄/RGO/GCE and other modified electrodes reported in literatures.

Modified Electrodes	Linear Range (M)	Detection Limit (M)	Ref.
NH2–Fe3O4/RGO/GCE	1 × 10−8~1 × 10−7; 1 × 10−7~1 × 10−6; 1 × 10−6~1 × 10−5	4.0 × 10−9	This work
Fe3O4–NH2@GS/GCE	2 × 10−7~3.8 × 10−5	1.26 × 10−7	[24]
Cu2O/RGO/GCE	1 × 10−8~1 × 10−6; 1 × 10−6~8 × 10−5	6.0 × 10−9	[35]
Pd/RGO/GCE	1 × 10−6~1.5 × 10−4	2.3 × 10−7	[47]
Fe3O4@Au/Gr/GCE	5 × 10−7~5 × 10−5	6.5 × 10−7	[48]
Fe3O4/RGO/CPE	2 × 10−8~5.8 × 10−6	6.5 × 10−9	[49]
MWCNT/RGO/GCE	2 × 10−7~4 × 10−4	2.2 × 10−8	[50]
Mn3O4–RGO/GCE	1 × 10−6~1.45 × 10−3	2.5 × 10−7	[51]
MnO2–RGO/GCE	6 × 10−8~1× 10−3; 1 × 10−6 ~8 × 10−5	1.0 × 10−9	[52]
MnO2 NR/RGO/GCE	5 × 10−8 ~ 4 × 10−4	1.0 × 10−8	[53]