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Study of the State of Water and Oil in Frozen Emulsions Using Time Domain NMR

✍ Scribed by D. Le Botlan; J. Wennington; J.C. Cheftel

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
72 KB
Volume
226
Category
Article
ISSN
0021-9797

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✦ Synopsis

Here T 1 and T * 2 relaxation time measurements by low-field NMR have been used to quantify the state of oil and water in frozen emulsions. Water-in-oil and oil-in-water emulsions have been studied. A discrete method (NLREG program) and a continuous method (CONTIN program) have been used to analyze the FID and inversion-recovery relaxation curves. The FID signal (T * 2 ) analysis allowed us to calculate the global solid-intermediate-liquid ratio, and the state of the solid and liquid phases was determined by the T 1 values. Thus we have been able to show that the major part of water (∼99%) is in a solid state in such emulsions (average droplet diameter of about 1.5 ¡m). This result was confirmed by the study of a solid paraffin-Span 80-water emulsion and a heavy watercaseinate-triolein emulsion. These first results have shown the interest of this new method for the study of the state of water and oil in frozen emulsions.

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