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Optical Sensor for Characterizing the Phase Transition in Salted Solutions

We propose a new optical sensor to characterize the solid-liquid phase transition in salted solutions. The probe mainly consists of a Raman spectrometer that extracts the vibrational properties from the light scattered by the salty medium. The spectrum of the O – H stretching band was shown to be st...

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Detalles Bibliográficos
Autores principales: Claverie, Rémy, Fontana, Marc D., Duričković, Ivana, Bourson, Patrice, Marchetti, Mario, Chassot, Jean-Marie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3274248/
https://www.ncbi.nlm.nih.gov/pubmed/22319327
http://dx.doi.org/10.3390/s100403815
Descripción
Sumario:We propose a new optical sensor to characterize the solid-liquid phase transition in salted solutions. The probe mainly consists of a Raman spectrometer that extracts the vibrational properties from the light scattered by the salty medium. The spectrum of the O – H stretching band was shown to be strongly affected by the introduction of NaCl and the temperature change as well. A parameter S(D) defined as the ratio of the integrated intensities of two parts of this band allows to study the temperature and concentration dependences of the phase transition. Then, an easy and efficient signal processing and the exploitation of a modified Boltzmann equation give information on the phase transition. Validations were done on solutions with varying concentration of NaCl.