A Multivariate Analysis of the Composition and Properties of Extra Virgin Olive Oils Produced from Different Cultivars Grown in Iran

2017 ◽  
Vol 100 (6) ◽  
pp. 1804-1813 ◽  
Author(s):  
Habib Shirzad ◽  
Vahid Niknam ◽  
Mehdi Taheri ◽  
Hassan Ebrahimzadeh
Keyword(s):  
Principal Component ◽  
Hierarchical Cluster ◽  
Acid Value ◽  
Virgin Olive Oils ◽  
Category Cluster ◽  
Olive Oils ◽  
Commercial Cultivation ◽  
Fa Composition ◽  
Saponification Value ◽  
Olive Cultivars

Abstract The present study investigated variations in extra virgin olive oils in relation to fatty acid (FA) composition and the characteristics of 10 olive cultivars. The findings demonstrated that their oil yield properties, including refractive index, acid value, peroxide value, saponification value, iodine value, and composition, were significantly different. Moreover, based on GC-MS analysis, the presence of oleic acid [C18:1(9)] was identified as one of the major components. The highest amount of 18:1(9) was found in four major varieties of cultivars, namely Zard, Roghani, Karidolia, and Korfolia. Hierarchical cluster analysis of principal component analysis revealed two distinct categories of cultivars based on their FAs. The first category (cluster I), consisted of Arbequina, Karydolia, Roghani, and Zard cultivars, which can be considered cultivars with good commercial cultivation potential due to their high contents of unsaturated FAs and oil quantities produced.

scholarly journals Comparison and Discrimination of Two Major Monocultivar Extra Virgin Olive Oils in the Southern Region of Peloponnese, According to Specific Compositional/Traceability Markers

Foods ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 155 ◽  
Author(s):  
Vasiliki Skiada ◽  
Panagiotis Tsarouhas ◽  
Theodoros Varzakas
Keyword(s):  
Fatty Acid ◽  
Olive Oil ◽  
Geographical Area ◽  
Virgin Olive Oil ◽  
Principal Component ◽  
Southern Region ◽  
Specific Chemical ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Olive Cultivars

The qualitative characteristics and chemical parameters were determined for 112 virgin olive oil samples of the two dominant olive cultivars in the southern region of Peloponnese, cv. Koroneiki and cv. Mastoides. As no relevant data exist for this geographical area, yet one of the most important olive-growing regions in Greece, this study aimed to evaluate and evidence the differences on specific chemical characteristics of the oils because of their botanical origin. Olive oils of Koroneiki variety were characterized by a three-fold lower concentration in heptadecanoic and heptadecenoic acid compared to oils of cv. Mastoides. In addition, Mastoides oils exhibited higher β-sitosterol and total sterols concentration and lower Δ-5-avenasterol and total erythodiol content compared to Koroneiki olive oils Analysis of variance and principal component analysis of the GC-analyzed olive oil samples showed substantial compositional differences in the fatty acid and sterolic profile between Koroneiki and Mastoides cultivars. Hence, results demonstrate that the fatty acid and sterolic profile can be used as exceptional compositional marker for olive oil authenticity.

Influence of olive cultivars and period of harvest on the contents of Cu, Cd, Pb, and Zn in virgin olive oils

2006 ◽  
Vol 99 (3) ◽  
pp. 525-529 ◽  
Author(s):  
Alberto Angioni ◽  
Maddalena Cabitza ◽  
Maria Teresa Russo ◽  
Pierluigi Caboni
Keyword(s):  
Virgin Olive Oils ◽  
Olive Oils ◽  
Olive Cultivars

scholarly journals High-Throughput Chemometric Quality Assessment of Extra Virgin Olive Oils Using a Microtiter Plate Reader

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4169
Author(s):  
Huihui He ◽  
Weiying Lu
Keyword(s):  
Quality Assessment ◽  
High Throughput ◽  
Latent Variables ◽  
Scatter Correction ◽  
Principal Component ◽  
Microtiter Plate ◽  
Food Ingredients ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Plate Reader

A commercially available microtiter plate reader was applied as a high-throughput counterpart of ultraviolet-visible (UV–Vis) spectrophotometer to identify the producing location of extra virgin olive oils (EVOOs). Multiplicative scatter correction and the first derivative was used to denoise the UV–Vis spectra and eliminate the effects of background drift. The spectra were analyzed using chemometrics methods including the principal component analysis (PCA) and the partial least squares-discriminant analysis (PLS-DA). The PLS-DA model on full spectra using 5 latent variables showed a classification accuracy of 97.92% by cross-validation. The overall results demonstrated that the use of a UV–Vis spectrophotometer based on the microtiter plate reader combined with chemometrics can be applied to the quality assessment of EVOOs. It is demonstrated that the microtiter plate reader can be a high-throughput tool in the quality assessment of food ingredients.

scholarly journals Chemical and Sensory Profiling of Monovarietal Extra Virgin Olive Oils from the Italian Marche Region

Antioxidants ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 330 ◽  
Author(s):  
Deborah Pacetti ◽  
Maria Chiara Boarelli ◽  
Rita Giovannetti ◽  
Stefano Ferraro ◽  
Paolo Conti ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Sensory Analysis ◽  
High Performance ◽  
Principal Component ◽  
Tocopherol Content ◽  
Volatile Fraction ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Marche Region ◽  
Total Antioxidant

Chemical and sensory peculiarities of monovarietal extra virgin olive oils (MEVOOs) from the cultivars (cvs.) Ascolana tenera (ASC), Coroncina (COR), Mignola (MIG), Piantone di Mogliano (MOG), and Raggia (RAG) from Marche region (Italy) are investigated. Their polar phenolic substances and α-tocopherol are analysed through high performance liquid chromatography with different detectors. Volatile substances, fatty acid composition, and squalene are analysed by gas chromatography coupled to mass spectrometry (MS) and to the flame ionization detector, respectively. Total antioxidant activity and sensory analysis were also performed. MOG showed high squalene content (on average 0.88 ± 0.16 g/100 g), high relative amount of α-copaene among volatiles, and the highest oleic acid percentage. MIG had high α-tocopherol content (on average 350.0 ± 57.6 mg kg−1) and high α-farnesene in the volatile fraction. ASC showed the highest sensory quality and the lignan pinoresinol with higher concentration as compared to the other MEVOOs (p < 0.05), which resulted in a possible chemical marker for this cv. RAG was characterized by the sensory note of almond, which corresponds to its highest (E)-2-hexenal percentage. Sensory analysis and an antioxidant activity assay performed on a set of industrial extra virgin olive oils purchased in supermarkets, highlighted MEVOOs’ superiority from these points of view. Principal component analysis displays the main characteristics of the cvs. investigated.

Characterisation of virgin olive oils from European olive cultivars introduced in Tunisia

2009 ◽  
Vol 111 (4) ◽  
pp. 392-401 ◽  
Author(s):  
Samia Dabbou ◽  
Manel Issaoui ◽  
Maurizio Servili ◽  
Agnese Taticchi ◽  
Samira Sifi ◽  
...  
Keyword(s):  
Virgin Olive Oils ◽  
Olive Oils ◽  
Olive Cultivars

Triterpenic Content and Chemometric Analysis of Virgin Olive Oils from Forty Olive Cultivars

2009 ◽  
Vol 57 (9) ◽  
pp. 3604-3610 ◽  
Author(s):  
Yosra Allouche ◽  
Antonio Jiménez ◽  
Marino Uceda ◽  
M. Paz Aguilera ◽  
José Juan Gaforio ◽  
...  
Keyword(s):  
Chemometric Analysis ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Olive Cultivars

scholarly journals Effect of cultivar and year of harvest on the mineral composition of Algerian extra-virgin olive oils

2020 ◽  
Vol 18 (1) ◽  
pp. e0901
Author(s):  
Karima Benamirouche-Harbi ◽  
Sonia Keciri ◽  
Zohir Sebai ◽  
Hicham Benamirouche ◽  
Lilya Boudriche
Keyword(s):  
Mineral Composition ◽  
Mineral Content ◽  
Graphite Furnace ◽  
Principal Component ◽  
Absorption Spectrometry ◽  
Mineral Elements ◽  
Technical Institute ◽  
Mineral Contents ◽  
Virgin Olive Oils ◽  
Olive Oils

Aim of study: To evaluate the effect of cultivar and year of harvest on the content of mineral elements of Algerian extra virgin olive oils.Area of study: Technical Institute of Arboriculture of Fruits and Vine (TIAFV), Bejaia, Algeria.Material and methods: The mineral contents of extra virgin olive oils from ten cultivars during two consecutive campaigns 2014/2015 and 2015/2016 were determined using atomic absorption spectrometry and absorption in a graphite furnace after microwave-assisted acid digestion. Principal component analysis was applied to correlate the mineral content with cultivar type and year of harvest.Main results: Mean concentrations for Fe, Zn, Cu, Na, K, Mg, As and Co in samples were observed in the range of 1.640-13.213, 1.546-32.866, 1.375-3.337, 19.666-104.720, 4.573-117.133, 0.120-2.560, 0.006-0.146 and 0.002-0.051 μg g-1, respectively. The first three principal components retained 76.25% of the variance. The determinants of the effect of cultivar type and year of harvest were Fe and Na; Mg, Co and As, respectively.Research highlights: The study showed that mineral composition of the olive oils was mainly determined by the cultivar and the year of harvest.

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