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

Table 2

Parameters of the electroanalytical determination of DA and AA using SWV.

Parameter	DA	AA
Optimum buffer	Phosphate	Phosphate
Optimum pH	6.00	6.00
Measured potential (mV)	200	30
Scan rate (mV s^-1)	100	100
Linear concentration range (μM)	80.0–800	1160–11600
Slope (μA cm^-2/μM)	0.329	0.062
Correlation coefficient ()	0.9808	0.9879
Standard deviation (SD) () (mM)	0.005	0.026
Relative standard deviation (%)	0.48	0.29
LOD (μM)	0.69	18
LOQ (μM)	2.3	62