Quality and Trace Element Profile of Tunisian Olive Oils Obtained from Plants Irrigated with Treated Wastewater

Figure 1

LDA plot for 90 olive oil samples (30 samples repeated three times) based on the concentration of 19 elements and using as input a priori five groups, that is, those corresponding to the olives harvested directly from the plants, called fresh, and those that have fallen naturally and stayed in contact with the soil irrigated with TWW. The moisture percentage of the olives were as follows: 50.73% (±5.31%) called 1st fall; 33.45% (±5.15%) called 2nd fall; 14.89% (±2.62%) called 3rd fall; 4.22% (±0.72%) called 4th fall.