Comprehensively considering the results of single-factor
experiment and the results of orthogonal array design, the
optimal conditions of extraction of red pigments from the residues
after removal of capsaicinoids were summarized as follows. The
concentration of ethanol was 95%; the extractive temperature of
water bath was at 90 C; the ratio of solvent to material was 4 (mL/
g); the extractive time was 120 min.