Voltammetric Determination of Ascorbic Acid Content in Cabbage Using Anthraquinone Modified Carbon Paste Electrode

Figure 7

SWVs of AQMCPE in pH 4 PBS containing 2 mM AA at various frequencies (a–g: 15, 20, 25, 30, 35, 40, and 45 Hz, respectively). Inset: plot of anodic peak current vs. square wave frequency.