Effects of olive wastewater and pomace extracts, lecithin, and ascorbyl palmitate on the oxidative stability of refined sunflower oil
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Dosyalar
Tarih
2018
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Wiley
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, the effects of olive mill wastewater (OMW) and olive pomace (OP) extracts (1 and 2 mg/g), lecithin (L, 1-5 mg/g), and ascorbyl palmitate (AP, 0.2 mg/g) on the oxidative stability of refined sunflower oil (SFO) and its purified triacylglycerols (TAGs) were investigated under accelerated oxidation conditions. Induction period of TAGs increased from 6.84 to 11.27 hr, with OMW methanol extract (1 mg/g), while OP extracts provided less protection (9.79 hr) at 90 degrees C in Rancimat. The K-232 values of the SFO with extracts (1 mg/g) and AP (0.2 mg/g) was lower than those of butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA), and alpha-tocopherol containing oil samples at 60 degrees C. Binary combinations of extracts with AP (0.2 mg/g) or L (5 mg/g) also effectively decreased the K-232 and K-270 values of TAGs during oxidation. In conclusion, OMW and OP extracts can be synergistically used with L or AP for stabilization of SFO against oxidation. Practical applications Generally, edible oils contain high amount of unsaturated fatty acids which are susceptible to oxidation during heat required food processes. Natural antioxidants are preferably used for increasing oxidative stability of edible oils. Olive mill byproducts contain valuable phenolic compounds that have high antioxidant capacity. In this study, we studied antioxidant efficiencies of the olive wastewater and pomace extracts in sunflower oil in combinations with lecithin and ascorbyl palmitate. These combinations can be successfully used to increase the oxidative stability of sunflower oil.
Açıklama
Anahtar Kelimeler
Olive Wastewater, Pomace Extracts, Lecithin, Ascorbyl Palmitate, Sunflower Oil
Kaynak
Journal Of Food Processing And Preservation
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
42
Sayı
9
