The effects of geographic region and cultivar on oxidative stability and elemental analysis of Tunisian extra virgin olive oil

Metals contents were determined in 18 samples of Extra Virgin Olive Oil (EVOO) collected from different regions in Tunisia, after microwave digestion with nitric acid and hydrogen peroxide. In oil obtained by the detection power of the ICP-MS technique was sufficient for the determination of trace metals. Oils were extracted using Lab Olive Oil Extractor Machine. The amounts of trace metals in EVOO were lower than the maximum values recommended by FAO/WHO expert committee on food and addictives and US environmental protection agency. Acidity value, K270 and K232 were also determined. The assessment of metal contents in EVOO showed significant differences (p < 0.0001) between the diverse regions and cultivars. ANOVA Test of Cochran is duo to affect by the agro-environmental conditions and the genetic cultivars. Indeed in this study, metals have shown no negative effects on the oxidative rate of the oils and no potential risk for the health of the consumers.

Automated summary

Metals content in 18 samples of Extra Virgin Olive Oil from different regions in Tunisia were determined and found to be lower than the maximum recommended values. Significant differences in metal content were observed between regions and cultivars. The study concluded that metals do not have a negative impact on the oxidative rate of oils and pose no potential health risks to consumers.