| Issue |
EPJ Web Conf.
Volume 287, 2023
EOS Annual Meeting (EOSAM 2023)
|
|
|---|---|---|
| Article Number | 09038 | |
| Number of page(s) | 2 | |
| Section | Topical Meeting (TOM) 9- Applications in Optics and Photonics | |
| DOI | https://doi.org/10.1051/epjconf/202328709038 | |
| Published online | 18 October 2023 | |
https://doi.org/10.1051/epjconf/202328709038
Refractive index measurements of ethanol-water binary liquid solutions using a graded-index fiber tip sensor
1 INESC TEC – Institute for Systems and Computer Engineering, Technology and Science, Porto, Portugal
2 Department of Engineering Physics, Faculty of Engineering, University of Porto, Porto, Portugal
3 Department of Physics and Astronomy, Faculty of Sciences, University of Porto, Porto, Portugal
4 LEPABE – Laboratory for Process Engineering, Environment, Biotechnology and Energy, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Porto, Portugal
5 ALiCE – Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Porto, Portugal
* Corresponding author: susana.o.silva@inesctec.pt
Published online: 18 October 2023
The refractometric analysis of ethanol-water mixtures is hampered because this type of binary solution does not present a linear behaviour. In this work it is proposed a multimode Graded-Index Fiber (GIF) tip sensor for the measurement of ethanol in binary liquid solutions of ethanol-water. The probe is fabricated by fusion-splicing a 500 µm GIF to a Single Mode Fiber (SMF) and it operates as a refractometric sensor in reflection. Samples of ethanol-water mixtures were measured at different temperatures (20°C to 60°C) to evaluate the probe’s capability to detect variations in ethanol refractive index. The samples have different % (v/v) of ethanol, in a range between 0% and 100%.
© The Authors, published by EDP Sciences, 2023
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