Abstract
Carbon nanopowder mixed with carbon ink was used as a working screen-printed electrode. This electrode consists of carbon nanopowder working electrode, carbon counter electrode, and silver/silver chloride reference electrode. The electrochemical behavior of ascorbic acid has been studied by cyclic voltammetry and differential pulse voltammetry with screen-printed carbon nanopowder electrode. The propose electrode will enhanced the sensitivity for antioxidance determination because increasing of the surface area of the working electrode. The voltammetric sensor offers several advantages to both the green chemistry and eco-friendly. The method was successfully employed with 2 microliter of the working solution dropped on the electrode surface. A linear concentration, limit of quantitation and limit of detection was sufficient for the ascorbic acid determination in the vitamin C tablet. The results obtained for the sample juices demonstrated that the powerful of the method.
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