Abstract
Abstract This research examines the effect of adding olive leaf on the yield and quality of the olive oil extracted from malaxation and ultrasound application during the olive oil extraction process. The olive variety Ayvalik was used in the trials, which included leaf addition of 2% and 5% and ultrasound application of 5, 10, 15, 20, 25, 30, 35, and 40 minutes (min). Several values, such as maturity index and oil yield, as well as olive oil parameters, including free acidity, peroxide value, oxidative stability, and specific ultraviolet absorption, were analyzed and examined. We also carried out sensory analyses on the extracted olive oils. The results show that the product extracted has no sensory defects and exhibits a fruitiness level greater than 0. The research showed that, in terms of yield and quality, a time span of 15 min with addition of 2% olive leaf would provide optimum conditions in ultrasound assisted olive oil extraction with olive leaf addition. The olive oils produced in this process fall into the category of “extra virgin olive oil”.
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