Application of Chitosan@Fe3O4 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<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.
Authors
- Phetlada Sanchayanukun (ORCID: https://orcid.org/0009-0004-6791-7865)
- Sasithorn Muncharoen (ORCID: https://orcid.org/0000-0002-4471-2304)
- Chanpen Karuwan (ORCID: https://orcid.org/0000-0001-5802-1582)
- Sudarut Pitakrut (ORCID: https://orcid.org/0009-0006-7045-6902)
Institutions
- Burapha University (TH)
- National Science and Technology Development Agency (TH)
- National Nanotechnology Center (TH)
Publication Details
- Journal
- Sensors
- Published
- 2025-02-26
- DOI
- https://doi.org/10.3390/s25051431
- Citations
- 3
- Primary Topic
- Electrochemical sensors and biosensors
- Type
- article
- Field-Weighted Citation Impact
- 2.19