INFLUENCE OF PARTIAL REPLACEMENT OF OLIVE OIL ON FRYING PERFORMANCE OF PALM OLEIN

ABSTRACT

The influence of partial replacement of palm olein (POo) with olive oil (Oo), (25 and 50%, w/w) was investigated during five consecutive days of frying. The results indicated that frying performance of POo was significantly (P < 0.05) influenced by partial replacement with olive oil. The highest change in peroxide value (PV), anisidine value (AV), totox value (TV), total polar compound (TPC), viscosity and melting point was shown by the control sample; whereas the replacement of 50% (w/w) palm olein with 50% (w/w) olive oil exhibited the least changes in PV, AV, TV, TPC, viscosity and melting point during the frying process. This study suggests that the partial replacement of palm olein containing a high proportion of saturated fatty acids (i.e., palmitic acid) with olive oil containing a high content of monounsaturated fatty acid (i.e., oleic acid) can provide oil blends with higher chemical stability against oxidation. On the other hand, the prepared oil blend remained liquid at ambient temperature, thereby enhancing the physical stability induced by partial replacement with olive oil.

PRACTICAL APPLICATIONS

Partial replacement of palm olein with olive oil containing high oleic acid can improve the oxidative stability of palm olein during the frying process compared with regular palm olein. Therefore, the proposed oil blend can be suggested as a suitable replacement for pure palm olein for frying and cooking purposes by providing a higher oxidative stability besides the beneficial effects of olive oil on human health.