Lipophilic composition of eleven apple seed oils: A promising source of unconventional oil from industry by-products

摘要

The profile of lipophilic compounds was studied in oils obtained from seeds of five dessert and six crab apple cultivars. Apple seeds were collected from by-products generated during the preparation of fruit salads and in juice pressing. The oil yield in the apple seeds ranged from 12.06 to 27.49 g/100 g dry weight base. The average level of oil obtained from crab apple seeds was higher by 30% when compared to dessert apple seeds. The fatty acid composition was dominated by palmitic acid (5.78-8.33%), oleic acid (20.68-29.00%) and linoleic acid (59.37-67.94%). Among the six detected phytosterols beta-sitosterol was predominant (51-94%). Total phytosterol concentration as well as squalene varied in different apple seed oils and amounted to 1.13-7.80 and 0.01-0.34 mg/g, respectively. Four significant correlations were found between oil yield and contents of oleic acid (r=0.822, p<0.01), alpha-linolenic acid (r = 0.919, p < 0.0001), beta-sitosterol (r = 0.931, p < 0.0001) and total phytosterols (r = 0.901, p < 0.001) in apple seed oils