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Liquid water-ice I phase diagrams under high pressure: sodium chloride and sucrose models for food systems
Bérengère Guignon1, Laura Otero, Antonio D Molina-García
1Instituto del Frío (C.S.I.C.), José Antonio Novais 10, 28040 Madrid, Spain.
Abstract:
The knowledge of high pressure and low temperature phase diagrams of aqueous systems is required in fields such as food sciences, biology, cryo-microscopy and geology, to reduce processing costs, improve treatments results or advance in physical phenomena understanding. The phase transition curve between liquid water and ice I for sucrose and sodium chloride solutions has been obtained for concentrations ranging from 16% to 36% and from 1.63% to 16.09% (w/w), respectively. An accurate experimental method, based on the pressurization of an ice-solution mixture, adequate to build the entire phase transition curve at constant concentration, has been developed. Simon-like equations have been used to empirically describe the phase transition curves, so that they allow easy data interpolation.
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