Innovative technologies for the extraction of saccharidic and phenolic fractions from Pleurotus eryngii

The extraction of bioactives from Pleurotus eryngii was addressed using innovative extraction techniques. Microwave hydrodiffusion and gravity, which yielded less than 1% of the initial material, can be proposed as an initial stage to dehydrate the mushroom. Autohydrolysis or hydrothermal extraction using water under sub critical conditions allowed solubilization of up to 80% of the dry weight of the mushroom and produced an extract rich in monosaccharides and oligosaccharides, which also contained 2 g gallic acid equivalents (GAE)/100 g extract and showed antiradical capacity equivalent to 30 mg Trolox/g extract. Supercritical carbon dioxide is an alternative solvent with ability to selectively extract lipophilic fractions (< 1% of the initial material) with antioxidant activity.