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Olive oil acidity information


Separation of oil and water during processing reduces the formation of acids

Olive oil contains small amounts of free fatty acids (meaning not attached to other fatty acids in the form of a triglyceride). Free acidity is an important parameter that defines the quality of olive oil. It is usually expressed as a percentage of oleic acid (the main fatty acid present in olive oil) in the oil. As defined by the European Commission regulation No. 2568/91 and subsequent amendments,[1] the highest quality olive oil (extra-virgin olive oil) must feature a free acidity lower than 0.8%. Virgin olive oil is characterized by acidity between 0.8% and 2%, while lampante olive oil (a low quality oil that is not edible) features a free acidity higher than 2%.[2] The increase of free acidity in olive oil is due to free fatty acids that are released from triglycerides.

  1. ^ "Regulation (EEC) No 2568/91 on the characteristics of olive oil and olive-residue oil and on the relevant methods of analysis".
  2. ^ Grossi, Marco; Di Lecce, Giuseppe; Gallina Toschi, Tullia; Riccò, Bruno (2014). "Fast and accurate determination of olive oil acidity by electrochemical impedance spectroscopy" (PDF). IEEE Sensors Journal. 14 (9): 2947–2954. doi:10.1109/JSEN.2014.2321323. S2CID 10659764.

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