Commercial tetra pack juice - evaluation of quality parameters

Abstract

The present study was conducted to investigate the physico-chemical parameters (titratable acidity, total soluble solids, antioxidant capacity and total phenolic compounds) of six different types of commercial Tetra Pack juices. The total phenolic content was measured byFolin-Ciocalteu reagent assay.Antioxidant activity determination was performed by the spectrophotometric method with the DPPH reagent (2,2-diphenyl-1-picrylhydrazyl). Results of the physico-chemical properties obtained show the following range of values for acidity (1.46-2.76 g/L malic acid), total solids (9.17-12.00 °Bx). The highest total phenolic content was 1.138 mg GAE/100g and the lowest 0.003 mg GAE/100g. It was shown that the content of total antioxidant activity in juices varied between 0.639 and 1.554.