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Modelling of virgin olive oil extraction using response surface methodology
Author(s) -
Espínola Francisco,
Moya Manuel,
Fernández Diego G.,
Castro Eulogio
Publication year - 2011
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.2011.02786.x
Subject(s) - olive oil , extraction (chemistry) , response surface methodology , yield (engineering) , polyphenol , mixing (physics) , pigment , food science , chemistry , botany , materials science , chromatography , biology , biochemistry , composite material , physics , organic chemistry , quantum mechanics , antioxidant
Summary Malaxation of the paste is the most important step for virgin olive oil extraction because it affects both oil yield and quality. In this work the influence of temperature and mixing time on oil yield, quality parameters and oil composition in photosynthetic pigments and total polyphenols is assessed by using Response Surface Methodology. Seven Picual‐variety olive samples from two consecutive seasons, with different maturity index, were used. Results show that temperature and malaxation time exert a positive influence in olive yield, with optimal values ranging from 20.1 to 32.2 °C and from 73.3 to 90 min. Oil quality decreased slightly as temperature and time of malaxation were increased. Top quality oils were obtained below 30 °C and shorter mixing time. The oil content in photosynthetic pigments increased with temperature and mixing time, while total polyphenols increased with temperature but decreased with mixing time.