Extraction of anthocyanins from haskap using cold plasma‐assisted enzyme

Abstract

BACKGROUND Haskap berries (Lonicera caerulea L.) are rich in anthocyanins. Cold plasma‐assisted enzyme method (CPEM) is an innovative method for green extraction of anthocyanins, which was optimized by an artificial neural network‐genetic algorithm (ANN‐GA) to maximize the yield. In this study, seven factors were screened using by Plackett–Burman design based on single‐factor experiments and optimized by ANN‐GA. RESULTS The results showed that the maximum total anthocyanin content (TAC, 42.45 ± 0.25 g cyanidin‐3‐glucoside equivalent (C3G) kg−1 dry weight, DW) was obtained under optimal pretreatment power of 192 W, pretreatment time of 29 s and liquid‐to‐solid ratio of 39 mL g−1. Cleavage and porosity appeared on the surface of the treated sample. The active ingredients and antioxidant capacity of the CPEM extracts were identified by ultra‐performance liquid chromatography with quadrupole time‐of‐flight mass spectrometry (UPLC‐Q‐TOF‐MS). Compared with other extraction technologies, CPEM presents the advantages of shortening the extraction time, reducing the solvent volume, and significantly increasing active ingredients and antioxidant activity. CONCLUSION The ANN‐GA has better predictive and higher accuracy than the response surface methodology (RSM) model and is more suitable for optimizing the CPEM by greatly improving the process yield and the utilization of biomass, thus contributing to the sustainability of the agri‐food chain. © 2022 Society of Chemical Industry.

Comparison on efficiency of pulse electric field, cold plasma and enzymatic pre-treatments for barberry anthocyanins extraction: Modeling and optimization

“…Pulsed electric at 3 levels of electric eld intensity (3000, 5000, and 7000 V/cm) and three levels of pulse numbers (50, 75, and 100) were applied. Cold plasma was carried out at 3 levels of voltage (60, 70, and 80 kV) and 3 levels of time (1, 3, and 5 min); also, enzymatic method, which leads to the best results enzyme concentration (0.5, 1, and 1.5%) and temperature (40,50, and 60 ° C), was performed. The best conditions for pulse electric eld were (7000 V/cm, 100), for cold plasma pre-treatment were (80 kV, 5 min) and for enzymatic pre-treatment were (1.5%, 60°C).…”