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. 2013 May 21;13(5):6759–6774. doi: 10.3390/s130506759

Figure 4.

Figure 4.

(a) Influence of the pH of solution on the gold disk electrode based biosensor response in aqueous solution containing a 0.1 M phosphate buffer and DA concentrations of 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 280, and 320 μM. Detection potential: −0.20 V vs. Ag/AgCl; (b) Influence of the enzyme concentration in the deposition solution on the gold disk electrode based biosensor response in aqueous solution containing a 0.1 M phosphate buffer of pH 7.5 and DA concentrations of 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 280, and 320 μM. Detection potential: −0.20 V vs. Ag/AgCl. (c) Influence of the detection potential in continuous amperometric mode under stirring conditions, on the gold disk electrode based biosensor response in aqueous solution containing a 0.1 M phosphate buffer of pH 7.5 and DA concentrations of 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 280, and 320 μM.