Determination of Fat, Fatty Acids and Tocopherol Content of Several Turkish Walnut Cultivars

Authors : Mesut ADA, Aibibula PAIZILA, Ömer Faruk BİLGİN, Şule Hilal ATTAR, Nurgül TÜREMİŞ, Salih KAFKAS, Ebruyasakafkas@gmailcom KAFKAS

Pages : 94-100

View : 25 | Download : 13

Publication Date : 2021-06-30

Article Type : Research Paper

Abstract :In this study, six Turkish local walnut insert ignore into journalissuearticles values(Juglans regia L.); cultivars grown in the Pozantı district of Adana province of Turkey were characterized in terms of fat, fatty acids, and tocopherols content. Total lipid and fatty acid content were analysed using Gas Chromatography Flame Ionization Technique insert ignore into journalissuearticles values(GC/FID); while, tocopherol content was analysed by High Performance Liquid Chromatography insert ignore into journalissuearticles values(HPLC); technique. The total fatty acid levels varied between 62.54% insert ignore into journalissuearticles values(Yalova-4); to 70.20% insert ignore into journalissuearticles values(Yalova-2);. Three saturated fatty acids were identified and quantified as stearic acid ranging from 1.96 to 3.25%, myristic acid ranging from 0.05 to 0.07% and palmitic acid ranging from 5.98 to 6.84%. As for the unsaturated fatty acids; linoleic acid which a predominant fatty acid insert ignore into journalissuearticles values(54.13-62.51%);, followed by oleic acid insert ignore into journalissuearticles values(18.82-27.09%);, a-linoleic acid insert ignore into journalissuearticles values(9.83-12.7%);, and palmitoleic acid insert ignore into journalissuearticles values(0.04-0.09%); were detected respectively. In this study, the spectrum of tocopherols comprised three isoforms; α, β, γ were also identified and quantified by HPLC technique. However, δ-tocopherol isoform was not detected. In the all examined walnut cultivars, the total tocopherol content varied from 67.18 insert ignore into journalissuearticles values(Bilecik); to 173.81 µg/g insert ignore into journalissuearticles values(Yalova-2);. γ-tocopherol, a-tocopherol and β- tocopherol content were found between 61.1 to 164.51 µg/g, 5.43 to 11.53 µg/g and 0.60 to 5.82 µg/g, respectively. Yalova-2 was the most promising cultivar in terms of total oil content and total tocopherol content.
Keywords : Walnut, total oil, fatty acids, tocopherols