Determination of some purity parameters in olive oils. Results from a collaborative study

Abstract

The results of a collaborative study with the participation of Governmental and Olive Oil Industry laboratories is presented. This study was carried out to determine the precision of the analytical methods used for quantifying certain components of olive oils. Samples of virgin olive oil, olive oil and residue olive oil were analysed for total sterols, sterolic composition, trans isomers from fatty acids, waxes and stigmastadienes, using the analytical methods included in the Commission Regulation EEC 2568/91 of the European Union and modifications therein, and in Document TC20/11 of the International Olive Oil Council (1993). The results have been statistically procesed according to the standard ISO 5725-1986 (E).

Keywords

• collaborative study
• olive oil
• purity parameter
• statistical analysis