Year 2018, Volume 5 , Issue 1, Pages 1 - 18 2017-09-01

Analysis of Chemical Compositions of 15 Different Cold-Pressed Oils Produced in Turkey: A Case Study of Tocopherol and Fatty Acid Analysis

Veysel U. CELENK [1] , Z. Pinar GUMUS [2] , Zeliha USTUN ARGON [3] , Mevlut BUYUKHELVACIGİL [4] , Ercument KARASULU [5]


Many people tend to prefer natural foods and supplements nowadays. Considering this tendency, this study assessed the most significant in quality and purity parameters tocopherol and fatty acid compositions of cold-pressed oils, namely black cumin, sesame, sunflower, poppy, pomegranate, nettle, pumpkin, grape, safflower, flax, canola seed, wheat germ, peanut, hazelnut, and walnut. This study deals with the sample preparation and validation of tocopherols using an HPLC-FLD method for simultaneous determination of α-β-γ-, and δ-tocopherols, and analysis of fatty acid methyl esters (FAME) with using GC-FID. The validated HPLC method was applied for the tocopherols’ analysis and measurement uncertainty was calculated for tocopherols and some fatty acids. The obtained data were evaluated by using principal component analysis to show the relationship between quality parameters and seed oils. Wheat germ, hazelnut, safflower, and sunflower oils have the highest tocopherol contents respectively with a predominance of α-tocopherol. Seed oils’ fatty acid compositions were classified according to proportions of oleic, linoleic, and other fatty acids. This study shows that the evaluated seeds are valuable sources of natural antioxidants and some specific and polyunsaturated fatty acids. The applied method can also be helpful for the industry to obtain quality analysis approach.



Seed oils, tocopherols, FAME, method validation, HPLC, PCA
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Subjects Engineering, Chemical, Engineering
Published Date Fall
Journal Section Articles
Authors

Author: Veysel U. CELENK
Institution: Ege University
Country: Turkey


Author: Z. Pinar GUMUS
Institution: Ege University
Country: Turkey


Author: Zeliha USTUN ARGON
Institution: Necmettin Erbakan University
Country: Turkey


Author: Mevlut BUYUKHELVACIGİL
Institution: Zade Vital Pharmaceuticals Inc
Country: Turkey


Author: Ercument KARASULU
Institution: Ege University
Country: Turkey


Dates

Application Date : August 17, 2017
Acceptance Date : October 10, 2017
Publication Date : September 1, 2017

Vancouver CELENK V , GUMUS Z , USTUN ARGON Z , BUYUKHELVACIGİL M , KARASULU E . Analysis of Chemical Compositions of 15 Different Cold-Pressed Oils Produced in Turkey: A Case Study of Tocopherol and Fatty Acid Analysis. Journal of the Turkish Chemical Society Section A: Chemistry. 2017; 18-1.