The volatile components of wood,bark,and root from Ulmus pumila at room temperature were detected by Gas Chromatography-Ion Mobility Spectrometer(GC-IMS).The volatile components released from the three parts of Ulmus pumila were analyzed and compared using methods including two-dimensional top view,fingerprint,principal component analysis,and molecular weight comparison.The results showed that 37 organic volatiles were identified from 3 parts of Ulmus pumila at room temperature,mainly including alcohols,ketones,aldehydes,esters,acids and other volatile compounds.These 37 volatile substances co...