Simultaneous Determination of Gallic Acid and Folic Acid in Fruit Juice Samples Using Square Wave Voltammetry at Electrochemically Pretreated Carbon Paste Electrode |
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| Authors: | Gizaw Tesfaye Negussie Negash Tesfu Hailu Merid Tessema |
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| Institution: | 1. Department of Chemistry, Addis Ababa University, P. O. Box 1176, 1176 Addis Ababa, Ethiopia;2. Addis Ababa Science and Technology University, P. O. Box 16417, 16417 Addis Ababa, Ethiopia |
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| Abstract: | An efficient sensor was developed for the simultaneous determination of gallic and folic acid in juice samples using an electrochemically pretreated carbon paste electrode. The electrode was characterized by CV and EIS. The electrochemical behavior of GA and FA was evaluated by CV and SWV. The electrode exhibited high electrocatalytic activity towards GA and FA due to high surface area. Under the optimized condition, linear plots in the ranges of 0.08–13 μM and 0.1 to 15 μM were obtained for GA and FA, respectively. The proposed method was successful for the simultaneous determination of GA and FA in juice samples with satisfactory recovery. |
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| Keywords: | Gallic acid folic acid electrochemical pretreatment square wave voltammetry fruit juice electrocatalytic activity |
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