Quality Evaluation, Total Phenolic Content, Organic Acid Profiles and Antioxidant Activity of Soft Drinks with Koruk (Sour Grape) Concentrate

Main Article Content

Ali Guler
Ozlem Tokusoglu


Objective: Koruk (sour grape) juice has a tart flavor and a strong acidity, owing to the acidifying flavoring properties and has an significant antioxidative agent.

Material and Methods: In this study; koruk juice utilizing in the production of new soft drinks including carbonated drinks, sherbet and ice tea products and their total phenolic contents, antioxidant activities and organic acid profiles were investigated.

Results: Depending on the proportion of koruk juice concentrate addition, the phenolics (TP) and DPPH antioxidant activity (AA) changed in the range of 27.30-365.64 mg/L, 18.42-83.33%, respectively.  It was determined that the most abundant organic acid type in soft drinks was malic acid and it represented more than 90% of total acidity in carbonated drinks and ice tea and 85% in sherbet.

Conclusion: Koruk juice is a potential antioxidant alternative for various range of products in soft drink sector

Article Details

How to Cite
Guler, A. ., & Tokusoglu, O. . (2019). Quality Evaluation, Total Phenolic Content, Organic Acid Profiles and Antioxidant Activity of Soft Drinks with Koruk (Sour Grape) Concentrate. Natural Science and Discovery, 2(2), 41–47. Retrieved from https://natscidiscovery.com/index.php/nsd/article/view/39
Research Article


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