Advisor(s)
Abstract(s)
The fatty acid composition has been traditionally used to discriminate the
different vegetable oils and confirm their authenticity. The aim of the present study
was to check the possible use of the fatty acid profile to differentiate varietal olive
oils of the three most important cultivars in Northeast Portugal (Cobrançosa,
Madural and Verdeal). Fifteen varietal olive oils from each of the three cultivars
were collected to achieve that goal.
Fatty acids were determined, as methylesters, by HRGC. Methylesters were
prepared by transesterefication with BF3/methanol after saponification with
methanolic KOH. The fatty acid pattern was performed with a Chrompack CP9001
equipped with a split-splitless injector, a FID and a 50m x 0,25 mm i.d. fused silica
capillary column coated with a 0.19µm film of CP-Sil88 (Chrompack). The
temperatures of injector, detector and oven were 230, 250 and 185ºC, respectively.
The results as shown by two-way Anova techniques and discriminant analysis
demonstrate that C16:1c, C17:1, C18, C18:1c, C18:2cc and C18:3ccc can be used to
discriminate the origin of each of the three olive oils.
Description
Keywords
Portuguese cultivars Varietal olive oil Fatty acids profile Discriminant analysis
Citation
Pereira, J.A.; Oliveira, M.B.P.P.; Casal, Susana; Alves, M.R. (2002). Discrimination of varietal olive oils of the portuguese cultivars Cobrançosa, Madural and Verdeal based on their fatty acids composition. In 4th International Symposium on Olive Growing. Valenzano. p. 591-594. ISBN 90-6605-756-4 e Acta Horticulturae. ISSN 0567-7572
Publisher
ISHS - International Society for Horticultural Science