Electrodeposition of 4-Benzenesulfonic Acid onto a Graphite-Epoxy Composite Electrode for the Enhanced Voltammetric Determination of Caffeine in Beverages

<div>Modified Randles circuit used to fit the spectra in complex plane, which presents a cell resistance (<i>R</i><sub>Ω</sub>), in series with charge transfer resistance, <i>R</i><sub>ct</sub>, and Warburg W element, in parallel with a constant phase element (CPE).</div>

Journal of Analytical Methods in Chemistry

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Figure 3

Figure 3: Electrodeposition of 4-Benzenesulfonic Acid onto a Graphite-Epoxy Composite Electrode for the Enhanced Voltammetric Determination of Caffeine in Beverages 

Figure 3 | Electrodeposition of 4-Benzenesulfonic Acid onto a Graphite-Epoxy Composite Electrode for the Enhanced Voltammetric Determination of Caffeine in Beverages 