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Food and Bioprocess Technology

, Volume 6, Issue 12, pp 3554–3563 | Cite as

Effect of Ultrasound-Assisted Osmotic Dehydration as a Pretreatment on Deep Fat Frying of Potatoes

  • Vahid Mohammadpour Karizaki
  • Serpil SahinEmail author
  • Gulum Sumnu
  • Mohammad Taghi Hamed Mosavian
  • Alexandru Luca
Original Paper

Abstract

The objective of this study was to investigate the possibility of using ultrasound-assisted osmotic dehydration (UAOD) as a pretreatment prior to frying and to study its effects on the quality of fried potatoes. The quality parameters, moisture content, oil uptake, color, texture, and microstructure of fried potatoes, were chosen. Quality of fried potatoes treated with UAOD was also compared with the ones treated with osmotic dehydration (OD). Potato slabs (40 × 40 × 7 mm) were pretreated with different osmotic solutions (15 % sodium chloride and 15 % sodium chloride/50 % sucrose solutions) at different temperatures (25, 45, and 65 °C) with and without ultrasonic waves for different treatment times. The pretreatment conditions which are OD for 90 min and UAOD for 30 min using 15 % sodium chloride/50 % sucrose solution were applied prior to frying at 170 °C for 2, 4, and 6 min. UAOD reduced the oil content of fried potatoes by 12.5 % (db) as compared to untreated fried potatoes at the end of frying. There was no significant difference between OD and UAOD in reduction of oil uptake in fried potatoes. However, UAOD was found to have the advantage of improving the color of French fries. In addition, it shortened the pretreatment time of OD by about 67 %. Cell structure of fried potato was damaged in the presence of pretreatments of OD and UAOD.

Keywords

Frying Osmotic dehydration Potato Ultrasound 

Notes

Acknowledgments

All the support by the Middle East Technical University and Iran Ministry of Science and Technology is acknowledged and much appreciated.

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Vahid Mohammadpour Karizaki
    • 1
  • Serpil Sahin
    • 2
    Email author
  • Gulum Sumnu
    • 2
  • Mohammad Taghi Hamed Mosavian
    • 1
  • Alexandru Luca
    • 2
  1. 1.Department of Chemical Engineering, Faculty of EngineeringFerdowsi University of MashhadMashhadIran
  2. 2.Department of Food EngineeringMiddle East Technical UniversityAnkaraTurkey

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