Front-Face Fluorescence Spectroscopy and Chemometrics for Quality Control of Cold-Pressed Rapeseed Oil During Storage

Ewa Sikorska , Krzysztof Wójcicki , Wojciech Kozak , Anna Gliszczyńska-Świgło , Igor Khmelinskii , Tomasz Górecki , Francesco Caponio , Vito M Paradiso , Carmine Summo , Antonella Pasqualone


The aim of this study was to test the usability of fluorescence spectroscopy to evaluate the stability of cold-pressed rapeseed oil during storage. Freshly-pressed rapeseed oil was stored in colorless and green glass bottles exposed to light, and in darkness for a period of 6 months. The quality deterioration of oils was evaluated on the basis of several chemical parameters (peroxide value, acid value, K232 and K270, polar compounds, tocopherols, carotenoids, pheophytins, oxygen concentration) and fluorescence. Parallel factor analysis (PARAFAC) of oil excitation-emission matrices revealed the presence of four fluorophores that showed different evolution throughout the storage period. The fluorescence study provided direct information about tocopherol and pheophytin degradation and revealed formation of a new fluorescent product. Principal component analysis (PCA) performed on analytical and fluorescence data showed that oxidation was more advanced in samples exposed to light due to the photo-induced processes; only a very minor effect of the bottle color was observed. Multiple linear regression (MLR) and partial least squares regression (PLSR) on the PARAFAC scores revealed a quantitative relationship between fluorescence and some of the chemical parameters.
Author Ewa Sikorska (WT / KTiAI)
Ewa Sikorska,,
- Department of Technology and Instrumental Analysis
, Krzysztof Wójcicki (WT / KTiAI)
Krzysztof Wójcicki,,
- Department of Technology and Instrumental Analysis
, Wojciech Kozak (WT / KTiEPP)
Wojciech Kozak,,
- Department of Industrial Products and Ecology
, Anna Gliszczyńska-Świgło (WT / KTiAI)
Anna Gliszczyńska-Świgło,,
- Department of Technology and Instrumental Analysis
, Igor Khmelinskii - Universidade do Algarve, Portugal
Igor Khmelinskii,,
, Tomasz Górecki - Adam Mickiewicz University (UAM)
Tomasz Górecki,,
, Francesco Caponio - University of Bari, Italy
Francesco Caponio,,
, Vito M Paradiso - University of Bari, Italy
Vito M Paradiso,,
, Carmine Summo - University of Bari, Italy
Carmine Summo,,
, Antonella Pasqualone - University of Bari, Italy
Antonella Pasqualone,,
Journal seriesFoods, ISSN 2304-8158, (N/A 70 pkt)
Issue year2019
Publication size in sheets0.75
Keywords in Polishfluorescencja, olej rzepakowy, PARAFAC, analiza regresji
Keywords in Englishfluorescence, rapeseed oil, multiway analysis, parallel factor analysis (PARAFAC), multivariate regression
Languageen angielski
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 07-04-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; WoS Impact Factor: 2018 = 3.011 (2)
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