Multiobjective Optimization of Total Monomeric Anthocyanins and Total Flavonoids Contents in Ultrasound-Assisted Extraction from Purple Potato Tubers

摘要

The total monomeric anthocyanins (TAC) and total flavonoids (except anthocyanins) contents (TFC) in ultrasound-assisted extraction from purple potato tubers have been established by analytical methods. In order to study the influences of two ultrasound-assisted extraction parameters (sonification time and solvent/solid ratio) on TAC and TFC, a 2(3) experimental design was performed. The second-order polynomials calculated by regression have shown very good predictions. The sensitivity of the considered ultrasound-assisted extraction parameters have been investigated by Monte Carlo simulations. The simultaneous maximization of TAC and TFC was the aim of a multiobjective optimization problem which has been solved by two methods, namely weighted sum and Pareto-optimal front. The maximum of TAC is obtained for the lower bound value of sonification time (5 min) and for a solvent/solid ratio of 20.66. The maximum of TFC is obtained for a sonification time of 13.39 min and for a solvent/solid ratio of 21.09.