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Influence of drying temeperature and wall material fraction on retention of phenolic compounds and antioxidant capacity of encapsulated blackthorn flower extract

Spray drying is one of the most effective encapsulation methods of phenolic compounds from plant extracts. The aim of this paper was to determine the influence of drying temperature (120, 150 and 180°C) and the ratio of wall material -maltodextrin (MD) 13-17 DE and extract solids (0, 5 ; 1 and 2) on the efficiency of encapsulation of total phenolic compounds and antioxidant capacity of blackthorn flower extract. Phenolic compounds were quantified by UPLC-MS/MS and individual concentrations were summed to obtain total phenolic content. Antioxidant capacity of encapsulated extracts was determined by ORAC method. The highest percentage of total phenols retention (97.49%) in relation with the initial extract was determined in the sample dried at drying temperature 180°C and the MD dry matter ratio 0.5: 1. The highest antioxidant capacity was determined in a sample dried at 180°C and the ratio of MD dry matter and 1: 1. The increase of the temperature at MD and dry matter ratio of 0.5: 1 and 1: 1 increases the total phenols and antioxidant capacity, while at the ratio of MD and dry matter of 2:1 the total phenols and antioxidant capacity decreases.

encapsulation, spray drying, total phenols, antioxidant capacity, blackthorn flowe

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