Wheat germ oil extracted by supercritical carbon dioxide with ethanol: Fatty acid composition

Authors

  • B. Parczewska-Plesnar Department of Chemistry, Faculty of Food Sciences, Warsaw University of Life Sciences
  • R. Brzozowski Industrial Chemistry Research Institute
  • H. Gwardiak Industrial Chemistry Research Institute
  • E. Białecka-Florjańczyk Department of Chemistry, Faculty of Food Sciences, Warsaw University of Life Sciences
  • Z. Bujnowski Industrial Chemistry Research Institute

DOI:

https://doi.org/10.3989/gya.1017153

Keywords:

Entrainer, Extraction, Polyunsaturated fatty acids, Supercritical CO2, Wheat germ oil

Abstract


In this work, supercritical fluid extraction (SFE) using CO2 with ethanol as entrainer was performed at a temperature of 40 oC under a pressure of 21 MPa. For comparison, a similar extraction without the entrainer was carried out. The extraction yield of wheat germ using supercritical CO2 with ethanol was slightly higher (10.7 wt%) than that of extraction without the entrainer (9.9 wt%). Fractions of SFE extracts were collected separately during the experiments and the composition of fatty acids in each fraction was analyzed. The SFE extracted oils were rich (63.4-71.3%) in the most valuable polyunsaturated fatty acids (PUFA) and their content in all collected fractions was approximately constant. Similar PUFA contents were found in the reference samples of oils extracted by n-hexane (66.2-67.0%), while the commercial cold-pressed oil contained significantly less PUFA (60.2%). These results show a higher nutritional value of the oil obtained by extraction with supercritical CO2 than cold pressed oil which is generally considered to be very valuable.

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Published

2016-09-30

How to Cite

1.
Parczewska-Plesnar B, Brzozowski R, Gwardiak H, Białecka-Florjańczyk E, Bujnowski Z. Wheat germ oil extracted by supercritical carbon dioxide with ethanol: Fatty acid composition. grasasaceites [Internet]. 2016Sep.30 [cited 2021Dec.5];67(3):e144. Available from: https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1610

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Research