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  • Title: Detection of the presence of refined hazelnut oil in refined olive oil by fluorescence spectroscopy.
    Author: Sayago A, García-Gonzalez DL, Morales MT, Aparicio R.
    Journal: J Agric Food Chem; 2007 Mar 21; 55(6):2068-71. PubMed ID: 17319679.
    Abstract:
    The fluorescence spectroscopy technique has been tested as regards its ability to differentiate between refined hazelnut and olive oils. Classification of these oils based on their excitation-emission fluorescence spectra data (spectral range 300-500 nm of the excitation spectra at lambdaem=655 and spectral range 650-900 of the emission spectra at lambdaex=50 nm) was performed using principal component analysis and artificial neural networks. Both methods provided good discrimination between the refined hazelnut and olive oils. The results have also pointed out the possibilities of a spectrofluorimetric method joined to multivariate analysis, to differentiate refined oils, and even to detect the presence of refined hazelnut oils in refined olive oils at percentages higher than 9%.
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