Abstract:

To optimize proanthocyanidins yield from rapeseed shell extracted by ultrasonic-assisted extraction, single factor experiments followed by response surface analysis combined with a 4-variable quadratic orthogonal rotation combination design were carried out. Results showed that the optimal ultrasonic-assisted extraction, namely using 54% aqueous ethanol to extract the powdered material having particle size of 60 mesh at a material/liquid ratio of 1:12 (g/mL) with the assistance of 22.5 min ultrasonic treatment, resulted in a proanthocyanidins yield of up to 37.12%.

Key words: rapeseed shell, proanthocyanidins, ultrasonic assistance, extraction, response surface methodology