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Laboratory Testing for Olive Oil Adulteration

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Food
Jan
06
2021

Laboratory Testing for Olive Oil Adulteration

Olive oil is obtained exclusively from the fruit of the olive tree using mechanical or other physical processes under conditions that do not alter the oil, without any treatment other than washing, crushing, centrifugation, and filtration, and without exposure to excessive heat.

As one of the most widely produced and consumed edible oils, olive oil must comply with established quality and authenticity criteria to ensure product integrity and consumer confidence.

Laboratory analyses for olive oil are generally classified into two categories:

Quality Parameters

  • Free Fatty Acidity
  • Peroxide Value
  • UV Absorbance Values
  • Insoluble Impurities in Ether
  • Moisture and Volatile Matter
  • Heavy Metals
  • Sensory Evaluation (Virgin Olive Oils)

Purity Parameters

  • Refractive Index
  • Fatty Acid Composition
  • Sterol Composition
  • Total Sterol Content
  • β-Position Palmitic and Stearic Acids
  • Wax Content
  • Triglyceride Composition
  • Stigmastadiene Content
  • Relative Density
  • Saponification Value
  • Iodine Value
  • Trans Fatty Acids
  • Maximum Difference Between Actual and Theoretical ECN42
  • Total Saturated Fatty Acids at the 2-Position of Triglycerides
  • Erythrodiol
  • Uvaol and Waxy Substances

Examples of common olive oil adulteration and the analytical methods used for detection include:

Adulteration with Other Vegetable Oils

  • Unsaponifiable Matter Analysis
  • Total Sterol Content and Sterol Composition
  • Fatty Acid Composition
  • Trans Fatty Acid Analysis
  • ECN42 Determination
  • Total Palmitic and Stearic Acids at the 2-Position of Triglycerides

Adulteration with Olive Pomace Oil

  • Erythrodiol and Uvaol Determination
  • Aliphatic Alcohol Analysis
  • Wax Content

Adulteration of Virgin Olive Oil with Refined Olive Oil

  • Specific UV Absorbance
  • Trans Fatty Acid Analysis
  • Stigmastadiene Determination

At Bilim Laboratory, we provide laboratory testing services for the detection of olive oil adulteration, verification of authenticity, and quality assessment. Our analyses include a comprehensive range of chemical and physical tests performed using internationally recognized methods and standards, including TSE, AOAC, COI, and AOCS, ensuring reliable and scientifically validated results.

 


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