Rapid NIR determination of alkyl esters in virgin olive oil
DOI:
https://doi.org/10.3989/gya.1275162Keywords:
Alkyl esters, Ethyl esters, NIRS, Olive oil, Quality, Sensory defectsAbstract
The regulation of The European Union for olive oil and olive pomace established the limit of 35 mg·kg-1 for fatty acids ethyl ester contents in extra virgin olive oils, from grinding seasons after 2016. In this work, predictive models have been established for measuring fatty acid ethyl and methyl esters and to measure the total fatty acid alkyl esters based on near infrared spectroscopy (NIRS), and used successfully for this purpose. The correlation coefficients from the external validation exercises carried out with these predictive models ranged from 0.84 to 0.91. Different classification tests using the same models for the thresholds 35 mg·kg-1 for fatty acid ethyl esters and 75 mg·kg-1 for fatty acid alkyl esters provided success percentages from 75.0% to 95.2%.
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References
Alba J. 2013. Forecasts of the 2013 campaign. II Foss Meeting with the olive sector. Instituto de la Grasa, CSIC, Sevilla. September, 19.
Armenta S, Garrigues S, De la Guardia M. 2007. Determination of edible oil parameters by near infrared spectrometry. Anal. Chim. Acta 596, 330–337. https://doi.org/10.1016/j.aca.2007.06.028 PMid:17631115
Bendini A, Cerretani L, Di Virgilio F, Belloni P, Lercker G, Gallina-Toschi T. 2007. In-process monitoring in industrial olive mill by means of FT-NIR. Europ. J. Lipid Sci. Technol. 109, 498–504. https://doi.org/10.1002/ejlt.200700001
Berardinelli A, Ragni L, Bendini A, Valli E, Conte L, Guarnieri A, Toschi TG. 2013. Rapid Screening of Fatty Acid Alkyl Esters in Olive Oils by Time Domain Reflectometry. J. Agric. Food Chem. 61, 10919–10924. https://doi.org/10.1021/jf402872m PMid:24168174
Boggia R, Borgogni C, Hysenaj V, Leardi R, Zunin P. 2014. Direct GC–(EI) MS determination of fatty acid alkyl esters in olive oils. Talanta 119, 60–67. https://doi.org/10.1016/j.talanta.2013.10.055 PMid:24401385
Cayuela JA, Moreda W, García JM. 2013. Rapid Determination of Olive Oil Oxidative Stability and Its Major Quality Parameters Using Vis/NIR Transmittance Spectroscopy. J. Agric. Food Chem. 61, 8056–8062. https://doi.org/10.1021/jf4021575 PMid:23909442
Cayuela JA, Gómez R, Moreda W, Pérez-Camino, MC. 2015. Sensory defects of virgin olive oil from a microbiological perspective. Trends in Food Sci. Technol. 43, 227–235. https://doi.org/10.1016/j.tifs.2015.02.007
Conte LS, Mariani C. 2013. A critical evaluation of some methods used to assess purity of olive oils. Workshop on authentication of olive oil. Madrid, June 2013, 10–11.
Costa AF, Coelho MJ, Gambarra FF, Bezerra SR, Harrop RK, Ugulino MC. 2008. NIR spectrometric determination of quality parameters in vegetable oils using PLS and variable selection. Food Res. Int. 41, 341–348. https://doi.org/10.1016/j.foodres.2007.12.013
European Commission Regulation. 1991. Regulation Nr. 2568/91 of the Comission on the characteristics of olive oils and olive pomace oils and their analytical methods.
European Commission Regulation. 2016. Commission Delegated Regulation 2016/2095 of 26 September 2016 amending Regulation (EEC) No 2568/91.
García-González DL, Baeten V, Fernández JA, Tena N. 2013. Infrared, raman, and fluorescence spectroscopies: Methodologies and applications. In Aparicio R and Harwood J (Eds.) Handbook of Olive Oil: Analysis and Properties. 2nd ed. Springer, New York, 363. https://doi.org/10.1007/978-1-4614-7777-8_10
Gómez-Coca RB, Moreda W, Pérez-Camino M. 2012. Fatty acid alkyl esters presence in olive oil vs. organoleptic assessment. Food Chemistry 135, 1205–1209. https://doi.org/10.1016/j.foodchem.2012.05.053 PMid:22953844
Gómez-Coca RB, Fernandes GB, Pérez-Camino MC, Moreda W. 2016. Fatty acid ethyl esters (FAEE) in extra virgin olive oil: A case study of a quality parameter. LWT - Food Sci. Technol. 66, 378–383. https://doi.org/10.1016/j.lwt.2015.10.063
Hourant P, Baeten V, Morales MT, Meurens M, Aparicio R. 2000. Oil and fat classification by selected bands of near-infrared spectroscopy. Appl. Spectrosc. 54, 1168–1174. https://doi.org/10.1366/0003702001950733
Mailer RJ. 2004. Rapid evaluation of olive oil quality by NIR reflectance spectroscopy. J. Am. Oil Chem. Soc. 81, 823–827. https://doi.org/10.1007/s11746-004-0986-4
Moyano MJ, Meléndez AJ, Alba J, Heredia FJ. 2008. A comprehensive study on the colour of virgin olive oils and its relationship with their chlorophylls and carotenoids indexes (I): CIEXYZ non-uniform colour space. Food Res. Int. 41, 505–512. https://doi.org/10.1016/j.foodres.2008.03.007
Pérez-Camino MC, Moreda W, Mateos R, Cert A. 2002. Determination of esters of fatty acids with low molecular weight alcohols in olive oils. J. Agric. Food Chem. 50, 4721–4725. https://doi.org/10.1021/jf025542+ PMid:12137504
Procida G, Giomo A, Cichelli A, Conte LS. 2005. Study of volatile compounds of defective virgin olive oils and sensory evaluation: a chemometric approach. J. Sci. Food Agric. 85, 2175–2183. https://doi.org/10.1002/jsfa.2122
Sato T, Kawano S, Iwamoto M. 1991. Near-infrared spectral patterns of fatty acid analysis from fats and oils. J. Am. Oil Chem. Soc. 68, 827–833. https://doi.org/10.1007/BF02660596
Valli E Bendini A, Maggio R, Cerretani L, Toschi TG, Casiraghi E, Lercker G. 2013. Detection of low-quality extra virgin olive oils by fatty acid alkyl esters evaluation: a preliminary and fast mid-infrared spectroscopy discrimination by a chemometric approach. Int. J. Food Sci. Technol. 48, 548–555. https://doi.org/10.1111/j.1365-2621.2012.03220.x
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