PL
Oceniono wpływ obróbki termicznej konwencjonalnej oraz z wykorzystaniem mikrofal na zawartość związków polarnych, pierwotnych i wtórnych produktów utlenienia oraz hydrolizy w olejach roślinnych, smalcu i margarynach.
EN
Concentrations of peroxides, aldehydes, free fatty acids and polar fraction in vegetable and animal fats heated using conventional and microwave oven were compared with the corresponding values for the raw products. The following fats were tested: lard, „Kujawski" and „Brölio" oils, olive oil, „Planta" and „Palma" margarines. The Totox index was also determined. The changes in microwave-heated fats were less evident than those in conventionally heated products. Olive oil proved to be most resistant to oxidation, irrespective of heating method. The concentration of the polar fraction, irrespective of product type or heating method, was within the acceptable limits.