Electrochemical Determination of Paracetamol Using Fe₃O₄/Reduced Graphene-Oxide-Based Electrode

Figure 7

(a) CV curves of PRC with different solvents ( = 3 · 10⁻⁴ M, 0.1 M PBS pH 7, (accumulation time) = 60 s, scan rate = 0.1 V⋅s⁻¹, (accumulation potential) = 0.2 V); (b) CVs for PRC at Fe₃O₄/rGO/Naf-GCE in 0.05 M B-RBS with pH in the range from 4.8 to 9.8. Inset presents the plots of potential and current of PRC peaks versus pH values; (c) CVs for PRC in different buffer solutions pH 6 ( = 3 · 10⁻⁴ M, = 60 s, scan rate = 0.1 mV⋅s⁻¹, = 0.2 V); (d) of PRC using different amounts of Fe₃O₄/rGO for modified electrode ( = 3 ⋅ 10⁻⁴ M, 0.1 M ABS pH 6, = 60 s, scan rate = 0.1 V⋅s⁻¹, = 0.2 V).

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