Electrochemical Determination of Dopamine on a Glassy Carbon Electrode Modified by Using Nanostructure Ruthenium Oxide Hexacyanoferrate/Ruthenium Hexacyanoferrate Thin Film

Table 1

Kinetic parameters extracted using EIS data obtained on the bare GC and GC/RuOHCF/RuHCF electrodes in 0.5 M NaNO3 at pH 1.5, in the absence of any external probe, 𝐴=0.0314 cm2, 𝐸_𝐷𝐶=+0.5.

Electrode	𝑅s (Ω)	𝑅ct (Ω)	𝑄𝜑 (μF)	𝑄dl (μF)	n
Bare GC	21.03 ± 3.00	—	—	19.40 ± 0.20	0.70
GC/RuOHCF/RuHCF	50.75 ± 0.35	(3.01 ± 0.23) ×  10^4	(2.30 ± 0.10) ×  10^3	12.60 ± 0.30	0.80

χ ² = 6.98×10⁻³.