Investigation of the Thermal Processing Effect on Physicochemical Properties of Honey and Process Optimization by Response Surface Methodology

Document Type : Research Paper

Authors

1 Masters of science, Department of Food Industries, Faculty of Agriculture and Natural Resources, Islamic Azad University of Khuzestan, Ahvaz, Iran

2 Faculty Member (Assistant Professor), food science and agriculture department, Standard Research Institute, Karaj, Alborz, Iran

3 Assistant Professor, Department of Food Industries and Agricultural Research, Standard Research Institute (SRI), Karaj, Iran

Abstract

Response surface methodology (RSM) was applied to investigate the effect of two independent variables, including temperature and time on the physicochemical properties of honey. Results showed that the thermal processing had no significant effect on free acidity, brix, moisture content, pH and sucrose of the samples (p> 0.05), while its effect on hydroxymethyl furfural (HMF), proline, diastase, red color and blue color index was significant (p< 0.05). The amount of proline varied between 140 to 230 mg/kg and the diastase content varied between 5 ± 0.1 and 16.5 ± 0.2 Goethe. The HMF content of treatments was obtained between 6.9±0.2 and 274.2±1.2 mg /kg. The range of color variations in the samples ranged from 1.0±0.06 to 6.8 ± 0.40 for red and 1.1±0.06 to 5.8 ± 0.40 for blue color. The optimization results of model showed that the best temperature and time of heating (in such a way that the amount of its diastase and proline was in the maximum and amount of its HMF and color darkness was in the minimum) is 50°C and 120 min, respectively.

Keywords

References

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Iranian Journal of Biosystems Engineering
Volume 51, Issue 2
July 2020
Pages 433-443

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History

  • Receive Date: 12 October 2019
  • Revise Date: 05 December 2019
  • Accept Date: 05 February 2020

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