Experimental study of NaCl aqueous solutions by Raman spectroscopy: towards a new optical sensor.
Raman spectroscopy was used to study the NaCl aqueous solutions around the solid-liquid phase transition. Special attention was devoted to the modification induced by the salt on the OH stretching band of water. Investigations were carried out in the temperature range between -21 and 10 degrees C, for concentrations from 0 to 200 g/L. We demonstrated that micro-Raman spectroscopy can be used as a marker, allowing the determination of the salt concentration of an aqueous solution with an error close to +/-5%.
Duricković
Ivana
I
Laboratoire Matériaux Optiques, Photonique et Systèmes, University Paul Verlaine of Metz and Supélec-2 rue Edouard Belin, 57070 Metz, France. Ivana.Durickovic@developpement-durable.gouv.fr
Marchetti
Mario
M
Claverie
Rémy
R
Bourson
Patrice
P
Chassot
Jean-Marie
JM
Fontana
Marc D
MD
D007053:Ice; D009994:Osmolar Concentration; D044367:Phase Transition; D015203:Reproducibility of Results; D012965:Sodium Chloride / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013696:Temperature; D014867:Water / Q000737:chemistry*
D007053:Ice; D014867:Water; D012965:Sodium Chloride