CO 2 laser infrared optothermal spectroscopy for quantitative adulteration studies in binary mixtures of extra‐virgin olive oil

Optothermal window spectroscopy at CO 2 laser infrared wavelengths was used to detect the extent of adulteration of extra‐virgin olive oil by sunflower and safflower oils. A good linearity between the strength of optothermal signal and the concentration of each adulterating compound was found. Predi...

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Bibliographic Details
Published in:Journal of the American Oil Chemists' Society 1998-03, Vol.75 (3), p.359-362
Main Authors: Favier, Jan Paul, Bicanic, Dane, Cozijnsen, Jan, van Veldhuizen, Beb, Helander, Per
Format: Article
Language:English
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Summary:Optothermal window spectroscopy at CO 2 laser infrared wavelengths was used to detect the extent of adulteration of extra‐virgin olive oil by sunflower and safflower oils. A good linearity between the strength of optothermal signal and the concentration of each adulterating compound was found. Predicted limits of detection presently attainable by this new method are 6 (w/w) and 4.5% (w/w) for extra‐virgin olive oil adulterated with safflower oil and sunflower oil, respectively, and were confirmed experimentally; the corresponding relative errors were 0.3 and 0.18%. Interference effects are comparable to those encountered in other spectroscopic methods at the same wavelength.
ISSN:0003-021X
1558-9331
DOI:10.1007/s11746-998-0053-4