Key words: Populus tremula L., aspen bark, supercritical fluid extraction, carbon dioxide, composition
Extracts from the aspen bark (Populus tremula L.) were obtained using supercritical (SC) fluid extraction with carbon dioxide at 313.15 and 333.15 K and pressures ranging from 15 to 35 MPa. Chromatography-mass spectrometry was used to determine the component of the CO2 extract of Populus tremula L., revealing a significant amount of fatty acids and their esters. Traditional liquid extraction with petroleum ether was found to be significantly less efficient than SC-CO2 extraction in terms of the content of steroidal and triterpenoid components of the aspen bark in the final product.