An aerosol-generating system comprises an encapsulated volatile liquid source comprising: a sorption element; a volatile liquid having a vapour pressure of at least about 20 Pa at 25℃ sorbed on the sorption element; and a sealant having a melting point of between about 40℃ and about 120℃ encapsulating the sorption element. The volatile liquid comprises a 2-oxo acid.一種包含經封裝的揮發性液體源之氣溶膠產生系統,其包含:吸收元件;揮發性液體,其在25℃下具有蒸氣壓至少約20巴斯卡且係吸收在該吸收元件上;及密封劑,其具有熔點在約40℃至約120℃間,其封裝該吸收元件。該揮發性液體包含2-側氧酸。