Novel eco-friendly extraction of high purity Eucommia ulmoides gum via composite enzyme hydrolysis pretreatment combined with a PEG-4000 aqueous solvent biphasic system

Using Eucommia ulmoides pericarp samaras as the raw material, Eucommia ulmoides gum (EUG) was extracted via composite enzyme hydrolysis pretreatment combined with a biphasic solution system consisting of PEG-4000 aqueous solution and petroleum ether.