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Fatty Acids-Based Quality Index to Differentiate Worldwide Commercial Pistachio Cultivars

1
Department of Chemistry, University of Zanjan, Zanjan 45195-313, Iran
2
Department of Analytical Chemistry Applied Chemometrics and Molecular Modelling, Center for Pharmaceutical Research (CePhaR), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, B-1090 Brussels, Belgium
3
Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, University of Vigo, Ourense Campus, E-32004 Ourense, Spain
*
Authors to whom correspondence should be addressed.
Molecules 2019, 24(1), 58; https://doi.org/10.3390/molecules24010058
Received: 13 December 2018 / Revised: 20 December 2018 / Accepted: 21 December 2018 / Published: 24 December 2018
(This article belongs to the Section Natural Products Chemistry)
The fatty acid profiles of five main commercial pistachio cultivars, including Ahmad-Aghaei, Akbari, Chrok, Kalle-Ghouchi, and Ohadi, were determined by gas chromatography: palmitic (C16:0), palmitoleic (C16:1), stearic (C18:0), oleic (C18:1), linoleic (C18:2), linolenic (C18:3), arachidic (C20:0), and gondoic (C20:1) acid. Based on the oleic to linoleic acid (O/L) ratio, a quality index was determined for these five cultivars: Ohadi (2.40) < Ahmad-Aghaei (2.60) < Kale-Ghouchi (2.94) < Chrok (3.05) < Akbari (3.66). Principal component analysis (PCA) of the fatty acid data yielded three significant PCs, which together account for 80.0% of the total variance in the dataset. A linear discriminant analysis (LDA) model that was evaluated with cross-validation correctly classified almost all of the samples: the average percent accuracy for the prediction set was 98.0%. The high predictive power for the prediction set shows the ability to indicate the cultivar of an unknown sample based on its fatty acid chromatographic fingerprint. View Full-Text
Keywords: authenticity; chromatographic fingerprint; fatty acids; classification; linear discriminant analysis authenticity; chromatographic fingerprint; fatty acids; classification; linear discriminant analysis
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MDPI and ACS Style

Esteki, M.; Ahmadi, P.; Vander Heyden, Y.; Simal-Gandara, J. Fatty Acids-Based Quality Index to Differentiate Worldwide Commercial Pistachio Cultivars. Molecules 2019, 24, 58. https://doi.org/10.3390/molecules24010058

AMA Style

Esteki M, Ahmadi P, Vander Heyden Y, Simal-Gandara J. Fatty Acids-Based Quality Index to Differentiate Worldwide Commercial Pistachio Cultivars. Molecules. 2019; 24(1):58. https://doi.org/10.3390/molecules24010058

Chicago/Turabian Style

Esteki, Mahnaz, Parvin Ahmadi, Yvan Vander Heyden, and Jesus Simal-Gandara. 2019. "Fatty Acids-Based Quality Index to Differentiate Worldwide Commercial Pistachio Cultivars" Molecules 24, no. 1: 58. https://doi.org/10.3390/molecules24010058

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