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Use of FTIR and UV-visible spectroscopy in determination of chemical characteristics of olive oils

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info:eu-repo/semantics/closedAccess

Date

2019-08

Author

Uncu, Oğuz
Özen, Banu
Tokatlı, Figen

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Abstract

It was aimed to predict fatty acid ethyl ester (FAEE), wax, diacylglycerol (DAG) and color pigment contents of olive oils by using rapid and non-destructive spectroscopic techniques (FTIR and UV-vis) individually and in combination. Prediction models were constructed by using partial least squares (PLS) regression with cross and external validation. FAEEs were estimated best with FTIR + UV-Vis spectroscopy (R-cv.(2) = 0.84, R-pred(2) = 0.90, and RPD = 3.0). PLS model with R-cv.(2) = 0.79, R-pred(2) = 0.71, and RPD = 1.9 was obtained for the estimation of 1,2 DAG using FTIR spectral data. Major pigments, lutein, pheophytin a and their derivatives and total xanthophylls were quantified successfully by FTIR + UV-Vis with a range of R-cv.(2) of 0.71-0.85, R-pred(2) of 0.70-0.84, and RPD = 1.5-2.5 values but the prediction of the rest of the pigments were poor (R-cv(2) = 0.60-0.76, R-pred(2) = 0.42-0.62, and RPD = 1.2-1.5). Combination of two spectral data resulted in average prediction of wax content of oils (R-cal(2) = 0.95, R-pred(2) = 0.75, and RPD = 1.9). FTIR and UV-vis spectroscopic techniques in combination with PLS regression provided promising results for the prediction of several chemical parameters of olive oils; therefore, they could be alternatives to traditional analysis methods.

Source

Talanta

Volume

201

URI

https://doi.org/10.1016/j.talanta.2019.03.116
https://hdl.handle.net/11147/9560

Collections

  • Food Engineering / Gıda Mühendisliği [242]
  • PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection [402]
  • Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection [4244]
  • WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection [4088]



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