Grasas y Aceites, Vol 53, No 2 (2002)

Effectiveness of the antioxidants BHA and BHT in selected vegetable oils during intermittent heating


https://doi.org/10.3989/gya.2002.v53.i2.305

John Tsaknis
Technological Education Institution (TEI) of Athens, Department of Food Technology, Greece

Stavros Lalas
Technological Education Institution (TEI) of Athens, Department of Food Technology, Greece

Evangelia Protopapa
Technological Education Institution (TEI) of Athens, Department of Food Technology, Greece

Abstract


The heating performance of olive oil was compared with that of corn oil, olive-residue oil and 50:50 mixture of olive oil and corn oil. The oils were heated intermittently for two hours per day at a temperature of 175 ± 5° C for five consecutive days. Under such conditions thermal and oxidative decomposition of the oils takes place. Free fatty acid content, peroxide values, E1%1 cm, at 232 and 270nm, polar compounds, colour and viscosity, of the oils all increased, whereas the iodine values, smoke points, polyunsaturated fatty acids content and tocopherol concentration decreased. The effectiveness of butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) at a rate of 200 ppm in retarding the deterioration of oils during static heating (175 ± 5° C), was studied and it was found that BHA gave a slight protection to the olive-residue oil and the BHT gave some protection to the corn oil, while both antioxidants were relatively ineffective in the other oils.

Keywords


BHA; BHT; Corn oil; Heating; Olive oil; Olive-residue oil

Full Text:


PDF


Copyright (c) 2002 Consejo Superior de Investigaciones Científicas (CSIC)

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.


Contact us grasasyaceites@ig.csic.es

Technical support soporte.tecnico.revistas@csic.es