Table 2.

Comparison of detection limits of DA, UA, and FA of E-GO modified CPE with other working electrodes.

Analyte	Electrode	Linear range (M)	Detection limit (M)	References
DA	SWCNT/GCE	1.0 × 10−6 to 1.0 × 10−4	7.0 × 10−6	50
	MC/GCE	5.0 × 10−7 to 10 × 10−4	2.0 × 10−7	51
	F-MWCNT/GCE	3.0 × 10−6 to 300 × 10−6	6.0 × 10−7	52
	CNT-TN/CPE	1.0 × 10−7 to 8.0 × 10−5	3.0 × 10−8	53
	E-GO/MCPE	0.5 × 10−6 to 1.5 × 10−6	3.1 × 10−8	Present work
UA	Helical CNT/GCE	6.7 × 10−6 to 6.5 × 10−5	1.5 × 10−6	54
	Graphene/GCE	2.0 × 10−6 to 1.2 × 10−4	6.0 × 10−7	46
	F-Graphene/CPE	1.7 × 10−6 to 9.0 × 10−5	4.5 × 10−7	55
	E-GO/MCPE	3.0 × 10−6 to 1.0 × 10−5	2.1 × 10−7	Present work
FA	ZrO2/MCPE	2.0 × 10−5 to 2.5 × 10−3	9.8 × 10−6	56
	MWCNT-PBD/CPE	30 × 10−6 to 800 × 10−6	1.0 × 10−6	57
	MWCNT/GCE	30 × 10−6 to 200 × 10−6	8.0 × 10−7	52
	E-GO/MCPE	10 × 10−5 to 90 × 10−5	5.7 × 10−7	Present work