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Bi-frequency-based microwave liquid sensor for multiple solutes quantification in aqueous solution

Thomas Chretiennot 1 David Dubuc 1 Katia Grenier 1
1 LAAS-MH2F - Équipe Micro et nanosystèmes HyperFréquences Fluidiques
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : This paper presents a technique able to detect and quantify two different solutes in aqueous solution thanks to a single shot microwave measurements of a resonant liquid sensor at two different frequencies. The principle of operation is based on isosbestic characteristics of the sensor relatively to the two considered solutes. The solutes quantification requires a calibration phase. Extracted concentration from measurements leads to root mean square error (RMSE) of only few g/L of solute (3.2 g/L for glucose and 1.7 g/L for sodium chloride). The technique then reveals the potential richness of the spectral signatures from microwave sensor for indentifying and quantifying complex liquids.
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https://hal.laas.fr/hal-01951713
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Thomas Chretiennot, David Dubuc, Katia Grenier. Bi-frequency-based microwave liquid sensor for multiple solutes quantification in aqueous solution. 44th IEEE European Microwave Conference, Oct 2014, Rome, Italy. pp.287-290, ⟨10.1109/EuMC.2014.6986426⟩. ⟨hal-01951713⟩

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