Direct In Situ Determination of Ascorbic Acid in Fruits by Screen‐Printed Carbon Electrodes Modified with Nylon‐6 Nanofibers |
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| Authors: | Carlos Alberto Fuenmayor Simona Benedetti Alessandro Pellicanò Maria Stella Cosio Saverio Mannino |
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| Affiliation: | 1. Department of Food, Environmental and Nutritional Sciences (DEFENS), University of Milan, Via Celoria 2, 20133 Milan, Italy;2. Instituto de Ciencia y Tecnología de Alimentos (ICTA), Universidad Nacional de Colombia, Ciudad Universitaria, Av. Kr. 30 # 45‐03, 111321 Bogotá, Colombia |
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| Abstract: | A simple sensing unit based on a disposable screen printed carbon electrode coated by an electrospun nylon‐6 nanofibrous membrane was developed for in situ selective determination of ascorbic acid (AA) in different types of fruits. The membrane, prepared by electrospinning, represents a selective barrier to possible interferents, such as phenolic compounds, allowing an improved selectivity towards AA. No sample preparation and/or dilution is necessary since the new device is applied directly “pricking” the fruit with the electrode. A good correlation was obtained between the amperometric in situ method and a reference chromatographic methodology (HPLC‐UV) when applied to various fruit samples. |
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| Keywords: | Amperometric sensors Ascorbic acid Nylon‐6 nanofibers Modified electrodes Fruits |
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