Moisture content in honey determination with a shear ultrasonic reflectometer

Moisture content in honey determination with a shear ultrasonic reflectometer An ultrasonic method, based on the measurement of the complex reflection coefficient at an interface (elastic material)/(viscoelastic material) has been developed for shear waves and an operating frequency of 10 MHz. With this technique, the dynamic elastic moduli G′ and G′′ can be obtained with a high accuracy. For various honeys and moisture contents we show that the temperature for which ( G ′′/ G ′) = 1 undergoes an important variation (25–3 °C) for moisture contents ranging from 15% to 20%. With this technique one can distinguish two honeys with moisture contents difference less than 0.2%. Regarding the high sensitivity of the method, considering the fact that ultrasonic waves can propagate through optically opaque materials and is a nondestructive approach, we propose a discussion about the application of this technique for honey quality control. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Food Engineering Elsevier

Moisture content in honey determination with a shear ultrasonic reflectometer

Journal of Food Engineering, Volume 96 (1) – Jan 1, 2010

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Publisher
Elsevier
Copyright
Copyright © 2009 Elsevier Ltd
ISSN
0260-8774
DOI
10.1016/j.jfoodeng.2009.06.049
Publisher site
See Article on Publisher Site

Abstract

An ultrasonic method, based on the measurement of the complex reflection coefficient at an interface (elastic material)/(viscoelastic material) has been developed for shear waves and an operating frequency of 10 MHz. With this technique, the dynamic elastic moduli G′ and G′′ can be obtained with a high accuracy. For various honeys and moisture contents we show that the temperature for which ( G ′′/ G ′) = 1 undergoes an important variation (25–3 °C) for moisture contents ranging from 15% to 20%. With this technique one can distinguish two honeys with moisture contents difference less than 0.2%. Regarding the high sensitivity of the method, considering the fact that ultrasonic waves can propagate through optically opaque materials and is a nondestructive approach, we propose a discussion about the application of this technique for honey quality control.

Journal

Journal of Food EngineeringElsevier

Published: Jan 1, 2010

References

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