4. Conclusions and outlook
It is shown that oil analysis can be performed with Fast DSC.
The crystallisation peaks of both olive oils and sunflower oils in cooling appear at the same temperatures as in
DSC, and cannot easily be distinguished. They show a much lower (5x) enthalpy (ca 12 J/g) in our Fast DSC set up
than found with DSC, presently unexplained. The heating curves show at least two major endothermic peaks, where
the one associated with melting occurs at a lower temperature than in DSC. The enthalpy of the melting peak is
comparable to that of the crystallisation peak.
When measuring olive oil vs sunflower oil, no significant crystallisation peak is present anymore, but large peaks
remain in the heating curve. Future investigations will focus on the missing enthalpies, and on the reliability of the
heating curve as an indicator of adulteration.
4. Conclusions and outlookIt is shown that oil analysis can be performed with Fast DSC.The crystallisation peaks of both olive oils and sunflower oils in cooling appear at the same temperatures as inDSC, and cannot easily be distinguished. They show a much lower (5x) enthalpy (ca 12 J/g) in our Fast DSC set upthan found with DSC, presently unexplained. The heating curves show at least two major endothermic peaks, wherethe one associated with melting occurs at a lower temperature than in DSC. The enthalpy of the melting peak iscomparable to that of the crystallisation peak.When measuring olive oil vs sunflower oil, no significant crystallisation peak is present anymore, but large peaksremain in the heating curve. Future investigations will focus on the missing enthalpies, and on the reliability of theheating curve as an indicator of adulteration.
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