Grasas y Aceites, Vol 51, No 3 (2000)

Free and total sterols in olive oils. Effects of neutralization


https://doi.org/10.3989/gya.2000.v51.i3.476

A. Pasqualone
Istituto dei Industrie Agrarie, Università di Bari. Via Amendola, 165/A. Bari, Italy, Italy

M. Catalano
Istituto dei Industrie Agrarie, Università di Bari. Via Amendola, 165/A. Bari, Italy, Italy

Abstract


In order to further investigate the variations of the ratio of free to total sterols in different categories of olive oil and to test the possibility to use this ratio as a parameter for olive oil quality evaluation, a direct GLC quali-quantitative determination of either free or total sterols was made, and their ratio calculated, over a set 13 samples of extra virgin oils and over a set of 28 current virgin and lampante oils. In order to study the effects of neutralization on free and total sterols, their amounts and ratio were also determined after the neutralization of the current virgin and lampante oils. The single components of free and total sterols were also analyzed, especially the most represented ones. The overall examination of the free x 100 / total sterols’ ratio values found over all the samples of 41 natural oils and 28 neutralized oils indicated that, when this ratio exceeds 70 %, it can exclude the presence of neutralized oils in extra virgin ones.

Keywords


Neutralization (effect of); Olive oil; Quality (evaluation); Sterols

Full Text:


PDF


Copyright (c) 2000 Consejo Superior de Investigaciones Científicas (CSIC)

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.


Contact us grasasyaceites@ig.csic.es

Technical support soporte.tecnico.revistas@csic.es