Optimization of the use of cellulolytic enzyme preparation for the extraction of health promoting anthocyanins from black carrot using response surface methodology

Anthocyanin-rich extracts from black carrots are being considered as a candidate replacer for the red colour in processed foods. The present investigation optimizes the extraction of anthocyanins with high phenolic content and low degradation parameters from black carrots using a cellulolytic multi-enzyme preparation known as Viscozyme. The optimized conditions for Viscozyme using a Box-Behnken design (BBD) of response surface methodology (RSM) were as follow: temperature (50.2 °C), extraction time (58.4 min) and enzyme concentration (0.20%). The predicted value of anthocyanins content was 1380 mg/L, which was near to the optimized experimental value of 1375 mg/L. The extracted anthocyanins based on above mentioned conditions exhibited the lowest degradation parameters such as degradation index (DI) of (0.86), browning index of (BI) (1.31) and were characterized with cyanidin 3-sinapoylxylosylglucosylgalactoside as being the most abundant. The findings clearly reveal that Viscozyme-assisted extraction (VAE) is the best approach for extracting superior quality extracts from black carrots with high anthocyanin and other phenolic component concentrations. •Enzyme and conventional extraction methods were compared.•Viscozyme-assisted extraction of bioactives from black carrot was found best.•Optimization of extraction conditions was performed using RSM.•Optimized extract has high bioactive content and antioxidant potential.•Degradation parameters were found lowest in optimized extract.