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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2012, Volume 63, Issue 9,





Mihaela Mihalache1 Aurelia Bratu, Anamaria Hanganu, Nicoleta-Aurelia Chira, Maria-Cristina Todasca, Sorin Rosca
A New Chemometric Strategy Based on 1H-NMR Data Applied
for Authentication of Romanian Vegetable Oils

Abstract:

1H-NMR spectroscopy coupled with Principal Component Analysis (PCA) as chemometrical method was used to authenticate Romanian vegetable oils (sunflower, soybean, linseed and rapeseed) according to their variety. 1H-NMR spectroscopy offers two possibilities for vegetable oils authentication. The first one, based on 1H-NMR integrals and systems of chemometric equations allowed to determine the composition of vegetable oil on four classes of fatty acids, which was further used as input for the PCA analysis in order to separate the oils according to their variety. The second possibility in terms of authentication is to transform the 1H-NMR spectra into series of numerical values (vectors) by integrating certain peaks or spectral windows. This strategy, investigated in the present paper, showed good results in discriminating among sunflower, soybean, rapeseed and linseed oils. Keywords: vegetable oils, 1H-NMR, PCA, authentication


Issue: 2012, Volume 63, Issue 9
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