Characterization of Pekmez Samples Produced with Different Fruits According to Sugar, Organic Acid, Antioxidant Activities, and Moisture Contents

Authors : Zeynep KALAYCIOĞLU

Pages : 458-467

Doi:10.21597/jist.1176404

View : 42 | Download : 13

Publication Date : 2023-03-01

Article Type : Research Paper

Abstract :Chemical properties of grape, cranberry, blueberries, pomegranate, black mulberry, juniper, and carob pekmez samples were investigated in this study. Capillary electrophoresis was used to assess the organic acids and sugar levels of pekmez samples. The two main sugars were found to be as glucose and fructose. Juniper pekmez has the lowest sugar with 22.6 g /100 g glucose and 20.1 g /100 g fructose. Black mulberry insert ignore into journalissuearticles values(35.6 g/100 g); has the highest glucose whereas grape insert ignore into journalissuearticles values(45.8 g /100 g); includes the highest fructose. Each pekmez samples included 8 organic acids which are oxalic, tartaric, malic, citric, succinic, acetic, lactic, and gluconic acid. 1,1-diphenyl-2-picryl-hydrazil insert ignore into journalissuearticles values(DPPH); technique was applied for testing the antioxidant activities. Carob pekmez scavenged DPPH the most with 96.28% inhibition value. The other pekmez samples have inhibited DPPH with the values ranging between 58.04% insert ignore into journalissuearticles values(cranberry); to 90.16 insert ignore into journalissuearticles values(juniper);. The samples\` total phenolic levels ranged from 265 mg GAE/g insert ignore into journalissuearticles values(blueberry); to 1070 mg GAE/g insert ignore into journalissuearticles values(grape);. Moisture contents were measured using a moisture analyzer. Cranberry pekmez insert ignore into journalissuearticles values(19.06%); and grape pekmez insert ignore into journalissuearticles values(12.24%); have significantly the highest moisture compared to other samples changing between 2.41% and 5.10%.
Keywords : Glucose, Fructose, Organic acid, DPPH, Total phenolic contents

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