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Figure 7: Differential pulse voltammograms of dopamine different concentration (from a to e): 5 μM, 10 μM, 15 μM, 20 μM, 25 μM in Phosphate buffer solution at pH 7.5 in presence of 8 μM Uric acid at Pregabalin modified carbon paste electrode with a scan rate 100 mV/s. |