Journal of the American Oil Chemists’ Society

, Volume 65, Issue 11, pp 1791–1795 | Cite as

Investigation of phase transitions in glyceride/paraffin oil mixtures using ultrasonic velocity measurements

  • D. J. McClements
  • M. J. W. Povey
Technical

Abstract

A pulse echo technique has been used to measure the ultrasonic velocity of a number of 15% w/w glyceride/paraffin oil mixtures with increasing temperature (0–70 C). At the lower temperatures the glycerides are completely solid and there is a fairly steady decrease in velocity with temperature (ca. −3.8 ms−1C−1). As the temperature rises the glycerides become increasingly soluble in the paraffin oil and the velocity decreases more rapidly. Once the glyceride is completely soluble in the paraffin oil, a fairly steady decrease in velocity with temperature (ca. −3.3 ms−1C−1) resumes. The dependence of ultrasonic velocity on the amount of solid glyceride present means the technique can be used to investigate phase transitions in binary glyceride/oil mixtures.

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Copyright information

© AOCS Press 1988

Authors and Affiliations

  • D. J. McClements
    • 1
  • M. J. W. Povey
    • 1
  1. 1.Procter Department of Food ScienceUniversity of LeedsEngland

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