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Effect of extraction systems on the quality of virgin olive oil
Author(s) -
Di Giovacchino L.,
Solinas M.,
Miccoli M.
Publication year - 1994
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02540535
Subject(s) - organoleptic , food science , peroxide value , polyphenol , extraction (chemistry) , chemistry , centrifugation , olive oil , acid value , fatty acid , chromatography , antioxidant , biochemistry
Research has been carried out to ascertai the effects of different processing systems on olive oil quality. Tests were performed in industrial oil mills that were equipped with both pressure and centrifugation systems. Results show that oils extracted from good‐quality olives do not differ in free fatty acids, peroxide value, ultraviolet absorption and organoleptic properties. Polyphenols and o ‐diphenols contents and induction times are higher in oils obtained from good‐quality olives by the pressure system because it does not require addition of water to the olive paste. The centrifugation system requires the addition of warm water to the olive paste and helps to obtain oils with a lower content of natural antioxidants. Oils obtained from poorquality or from ripe olives in continuous centrifugal plants are lower in free fatty acids than those obtained by the pressure system.