Delay oil oxidation during frying process
Abstract:
Blend oil (mixed of refined sunflower and soy oils 1:1 w/w) containing add 200 ppm of rosemary leaves methanolic extract (rosemary extract) (RE) and 3% refined rice bran oil (RRBO), were used in frying process at 180ْ c for 5 hrs/day, for consecutive days to delay oil oxidation during frying. Therefore, rosemary extract (methanolic extract) was analyzed by HPLC technique for identification of flavonoides compounds ( as a specific active compounds; including refractive index(RI). Red color unit ( R), viscosity, acidity (FFA), peroxide value (PV), iodine value (IV) oxidized fatty acid (OFA), polymer content (PC), total polar components ( TPC) and trans fatty acid (TFA) as eliadic acid were determined. The results indicated that; rosemary extract contained about eight flavonoids compounds (hypersoid, rutin, 3-OH flavon, luleotin, kampferlo, sakarutin, querectrin and apeginin).
Addition of RE or RRBO to frying oil caused delay oil oxidation during frying process compared with frying oil without any addition. Also, the results indicated that rosemary extract was more effective in reducing formation of PV, FFA, OFA, PC, TPC and TFA in frying oil than refined rice bran oil.

Publication year 2010
Pages 929-641
Organization Name
Author(s) from ARC
Publication Type Journal
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