Deep eutectic solvents (DES) are effective for extracting polyphenols from Carménère grape pomace, but their performance under hot pressurized conditions (HPLE) needs further research.
In tests, mixtures of water/DES and water/hydrogen bond donors (HBDs) were evaluated, revealing that HBDs like ethylene glycol and glycerol yielded better extraction results than DES in both atmospheric and pressurized methods.
HPLE outperformed atmospheric solid-liquid extraction (ASLE), significantly enhancing the recovery rates of various polyphenols due to high pressure, which also helped break down the plant matrix for easier extraction.