Application of Chitosan@Fe<sub>3</sub>O<sub>4</sub> Nanoparticle-Modified Screen-Printed Graphene-Based Electrode for Simultaneous Analysis of Nitrite and Ascorbic Acid in Hydroponics and Fruit Juice
In this work, the development of screen-printed electrodes modified with chitosan-coated magnetite nanoparticles (CTS@Fe<sub>3</sub>O<sub>4</sub>/SPGNE) for the simultaneous determination of nitrite (NO<sub>2</sub><sup>−</sup>) and ascorbic acid (AA<...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-02-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/25/5/1431 |
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| Summary: | In this work, the development of screen-printed electrodes modified with chitosan-coated magnetite nanoparticles (CTS@Fe<sub>3</sub>O<sub>4</sub>/SPGNE) for the simultaneous determination of nitrite (NO<sub>2</sub><sup>−</sup>) and ascorbic acid (AA<sup>−</sup>) is presented. The study investigated various ratios of graphene to chitosan-coated magnetite nanoparticles (CTS@Fe<sub>3</sub>O<sub>4</sub>), as well as the optimal pH. These factors were examined due to their impact on the selectivity and sensitivity of the analysis. The results indicated that a graphene paste to CTS@Fe<sub>3</sub>O<sub>4</sub> ratio of 16:1.0 g and a pH of 4 were optimal for the analysis of both NO<sub>2</sub><sup>−</sup> and AA<sup>−</sup>. Additionally, the behavior of the proposed electrode, its analytical performance, and interference studies were thoroughly examined. Furthermore, the CTS@Fe<sub>3</sub>O<sub>4</sub>/SPGNE electrode shows potential for the simultaneous determination of NO<sub>2</sub><sup>−</sup> and AA<sup>−</sup> in hydroponics and fruit juice samples. |
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| ISSN: | 1424-8220 |