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Updated: May 25, 2026

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

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Published on: September 4, 2015

Optical sensor for characterizing the phase transition in salted solutions.

Rémy Claverie¹, Marc D Fontana, Ivana Duričković

¹Laboratoire Régional des Ponts et Chaussées de Nancy, Centre d'Études Techniques de l'Équipement de l'Est-71 rue de la grande haie, 54510 Tomblaine, France. remy.claverie@developpement-durable.gouv.fr

Sensors (Basel, Switzerland)

|February 10, 2012

Summary

A novel Raman spectroscopy sensor accurately characterizes solid-liquid phase transitions in salt solutions. This method analyzes O-H band shifts, providing precise data on temperature and concentration effects for phase change studies.

Keywords:

Raman sensor phase transition salted solution

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Thermal Scanning Conductometry (TSC) as a General Method for Studying and Controlling the Phase Behavior of Conductive Physical Gels

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Published on: January 23, 2018

Area of Science:

Analytical Chemistry
Physical Chemistry
Spectroscopy

Background:

Solid-liquid phase transitions are critical in various chemical and physical processes.
Characterizing these transitions in solutions, especially with varying salt concentrations and temperatures, requires precise analytical methods.

Purpose of the Study:

To introduce a new optical sensor for characterizing solid-liquid phase transitions in salted solutions.
To demonstrate the sensor's ability to analyze temperature and concentration dependencies of these phase transitions.

Main Methods:

Utilized a Raman spectrometer to analyze vibrational properties of salted solutions.
Focused on the O-H stretching band spectrum, which is sensitive to NaCl concentration and temperature.
Developed a parameter (SD) based on spectral band intensities for quantitative analysis.

Main Results:

The O-H stretching band spectrum showed significant changes with NaCl introduction and temperature variations.
The SD parameter effectively correlated with temperature and concentration, enabling phase transition study.
Validated the sensor's performance on NaCl solutions across different concentrations.

Conclusions:

The proposed Raman spectroscopy-based optical sensor is effective for characterizing solid-liquid phase transitions in salt solutions.
The method provides an easy and efficient way to study temperature and concentration effects on phase transitions.
The modified Boltzmann equation aids in extracting phase transition information from spectral data.