Differential Electroanalysis of Dopamine in the Presence of a Large Excess of Ascorbic Acid at a Nickel Oxide Nanoparticle-Modified Glassy Carbon Electrode

Table 1

Surface composition of GC, GC_ox, GC_ox/Ni, and GC_ox/NiO_x electrodes.

Electrode	Elements	Atomic content (at.%)	Weight content (wt.%)
GC	C K	97.7	96.89
	O K	2.35	3.11
GCox	C K	92.7	90.56
	O K	7.28	9.44
GCox/Ni	C K	91.6	85.16
	O K	6.87	8.38
	Ni K	1.58	6.46
GCox/NiOx	C K	76.2	70.54
	O K	23.8	29.29
	Ni K	0.04	0.17