Quantitative determination of free fatty acids in extra virgin olive oils by multivariate methods and Fourier transform infrared spectroscopy considering different absorption modes

References

• Boskou, D. Olive Oil: Chemistry and Technology; 2nd ed.; AOCS Press: Champaign, IL, 2006; 113.
   Google Scholar
• Di Vaio, C.; Nocerino, S.; Paduano, A.; Sacchi, R. Influence of Some Environmental Factors on Drupe Maturation and Olive Oil Composition. Journal of the Science of Food and Agriculture 2013, 93, 1134–1139.
   PubMed Web of Science ®Google Scholar
• Rohman, A. Infrared Spectroscopy for Quantitative Analysis and Oil Parameters of Olive Oil and Virgin Coconut Oil: A Review. International Journal of Food Properties 2016. doi:10.1080/10942912.2016.1213742
   Web of Science ®Google Scholar
• Calabriso, N.; Scoditti, E.; Pellegrino, M.; Annunziata Carluccio, M. Olive Oil. In The Mediterranean Diet: An Evidence-Based Approach; Preedy, V.R.; Watson, R.R.; Eds.; Academic Press: London, UK, 2015; 135–142.
   Google Scholar
• Topkafa, M.; Ayyildiz, H.F. An Implementation of Central Composite Design: Effect of Microwave and Conventional Heating Techniques on the Triglyceride Composition and Trans Isomer Formation in Corn Oil. International Journal of Food Properties 2017, 20 (1), 198–212.
   Web of Science ®Google Scholar
• Firestone, D. Official Methods and Recommended Practices of the American Oil Chemists’ Society; American Oil Chemists’ Society: Champaign, IL, 1989.
   Google Scholar
• Rohman, A.; Che Man, Y.B. Authentication of Extra Virgin Olive Oil from Sesame Oil Using FTIR Spectroscopy and Gas Chromatography. International Journal of Food Properties 2012, 15 (6), 1309–1318.
   Web of Science ®Google Scholar
• Mahesar, S.A.; Shah, S.N.; Mahesar, A.W.; Kandhro, A.A.; Khaskheli, A.R.; Menghwar, P.; Sherazi, S.T.H. A Chemometric Approach for the Quantification of Free Fatty Acids in Cottonseed Oil by Fourier Transform Infrared Spectroscopy. International Journal of Food Properties 2016. doi:10.1080/10942912.2016.1223129
   Google Scholar
• Nurrulhidayah, A.F.; Che Man, Y.B.; Shuhaimi, M.; Amin, I.; Khatib, A. FTIR-ATR Spectroscopy Based Metabolite Fingerprinting as a Direct Determination of Butter Adulterated with Lard. International Journal of Food Properties 2015, 18 (2), 372–379.
   Web of Science ®Google Scholar
• Li, H.; van de Voort, F.R.; Sedman, J.; Ismail, A.A. Rapid Determination of Cis and Trans Content, Iodine Value, and Saponification Number of Edible Oils by Fourier Transform Near-Infrared Spectroscopy. Journal of the American Oil Chemists’ Society 1999, 76 (4), 491–497.
   Web of Science ®Google Scholar
• Cox, R.; Lebrasseur, J.; Michiels, E.; Buijs, H.; Li, H.; van de Voort, F.R.; Ismail, A.A.; Sedman, J. Determination of Iodine Value with a Fourier Transform-near Infrared Based Global Calibration Using Disposable Vials: An International Collaborative Study. Journal of the American Oil Chemists’ Society 2000, 77, 1229–1234.
   Web of Science ®Google Scholar
• Li, H.; van de Voort, F.R.; Ismail, A.A.; Sedman, J.; Cox, R.; Simard, C.; Buijs, H. Discrimination of Edible Oil Products and Quantitative Determination of Their Iodine Value by Fourier Transform Near-infrared Spectroscopy. Journal of the American Oil Chemists’ Society 2000, 77, 29–36.
   Web of Science ®Google Scholar
• Sedman, J.; van de Voort, F.R.; Ismail, A.A.; Maes, P. Industrial Validation of Fourier Transform Infrared Trans and Lodine Value Analyses of Fats and Oils. Journal of the American Oil Chemists’ Society 1998, 75, 33–39.
   Web of Science ®Google Scholar
• Li, H.; van de Voort, F.R.; Ismail, A.A.; Cox, R. Determination of Peroxide Value by Fourier Transform Near-infrared Spectroscopy. Journal of the American Oil Chemists’ Society 2000, 77, 137–142.
   Web of Science ®Google Scholar
• Ma, K.; van de Voort, F.R.; Ismail, A.A.; Sedman, J. Quantitative Determination of Hydroperoxides by Fourier Transform Infrared Spectroscopy with a Disposable Infrared Card. Journal of the American Oil Chemists’ Society 1998, 75, 1095–1101.
   Web of Science ®Google Scholar
• Ma, K.; van de Voort, F.R.; Sedman, J.; Ismail, A.A. Stoichiometric Determination of Hydroperoxides in Fats and Oils by Fourier Transform Infrared Spectroscopy. Journal of the American Oil Chemists’ Society 1997, 74, 897–906.
   Web of Science ®Google Scholar
• Meng, X.; Sedman, J.; van de Voort, F.R. Improving the Determination of Moisture in Edible Oils by FTIR Spectroscopy Using Acetonitrile Extraction. Food Chemistry 2012, 135, 722–729.
   PubMed Web of Science ®Google Scholar
• Bertran, E.; Blanco, M.; Coello, J.; Iturriaga, H.; Maspoch, S.; Montoliu, I. Determination of Olive Oil Free Fatty Acid by Fourier Transform Infrared Spectroscopy. Journal of the American Oil Chemists’ Society 1999, 76, 611–616.
   Web of Science ®Google Scholar
• Li-Chan, E.C.Y.; Ismail, A.A.; Sedman, J.; van de Voort, F.R. Vibrational Spectroscopy of Food and Food Products. In Handbook of Vibrational Spectroscopy; Chalmers, J.M.; Peter, R.G.; Eds.; John Wiley & Sons: NY, USA, 2006; 3629–3662.
   Google Scholar
• Ismail, A.A.; van de Voort, F.R.; Sedman, J. Chapter 4 Fourier Transform Infrared Spectroscopy: Principles and Applications. In Techniques and Instrumentation in Analytical Chemistry; Paré, J.R.J.; Bélanger, J.M.R.; Eds.; Elsevier: Amsterdam, Netherlands, 1997; 93–139.
   Google Scholar
• Silverstein, R.M.; Bassler, G.C.; Morill, T.C. Infrared Spectrometry. In Spectrometric Identification of Organic Compounds; Silverstein, R.M.; Bassler, G.C.; Morill, T.C.; Eds.; John Wiley & Sons: NY, USA, 1991; 71–143.
   Google Scholar
• Fuller, M.P.; Ritter, G.L.; Draper, C.S. Partial Least-Squares Quantitative Analysis of Infrared Spectroscopic Data. Part I: Algorithm Implementation. Applications Spectroscopic 1988, 42, 217–227.
   Web of Science ®Google Scholar
• Haaland, D.M.; Thomas, E.V. Partial Least-squares Methods for Spectral Analyses. 1. Relation to Other Quantitative Calibration Methods and the Extraction of Qualitative Information. Analytical Chemistry 1988, 60, 1193–1202.
   Web of Science ®Google Scholar
• Picard, R.R.; Cook, R.D. Cross-validation of Regression Models. Journal American Statistical Association 1984, 79, 575–583.
   Web of Science ®Google Scholar