use of electronic and human nose for monitoring rapeseed oil autoxidation

• Published in: European journal of lipid science and technology 2008, Vol.110 (1), p.61-72
• Main Authors: Mildner-Szkudlarz, Sylwia, Jeleń, Henryk H, Zawirska-Wojtasiak, Renata
• Format: Article
• Language: English
• Subjects: Biological and medical sciences; Electronic nose; Fat industries; Food industries; Fundamental and applied biological sciences. Psychology; Lipid oxidation; Rapeseed oil; Sensory profile analysis; Shelf life
• ISSN: 1438-7697; 1438-9312
• DOI: 10.1002/ejlt.200700009

This work was aimed at assessing the effectiveness of the electronic nose to monitor off-flavor associated with lipid oxidation as a supplementary tool to human sensory panel assessment. Therefore, correlations between electronic nose and sensory analysis were determined. Also GC analyses and chemical analyses of oil samples were run to characterize the analyzed samples with well-described parameters. Refined rapeseed oil was subjected to an accelerated storage test for 12 days at 60 °C and to an ambient temperature storage test in which it was stored in retail plastic bottles for up to 6 months. PCA of electronic nose data samples stored at an elevated temperature was related to PCA of sensory analysis, and similarities in sample clustering were observed. For samples stored at room temperature, the human panel showed greater sensitivity than the electronic nose. Prediction models based on PLS of electronic nose data were able to predict the sensory quality changes during storage at elevated and room temperature, ranging from 0.721 to 0.989 and from 0.849 to 0.881 (p