A liquid composition according to the present invention contains, as sorption components, a hydrocarbon component, an ester component, an aldehyde component, an alcohol component, and a phenol component. These sorption components contain at least one compound having an evaporation energy-based solubility parameter of not less than 26.3. When this liquid composition is used to evaluate the sorption behavior of flavor compounds, it is possible to evaluate the sorption behavior of the flavor compounds, even in a packaging container using a high-polarity material such as PET, with a higher degree of reliability.