The dynamic changes in the composition and content of volatile components during the solid-state fermentation to produce traditional Chinese vinegar Daqu were analyzed by headspace-solid phase microextraction–gas chromatography–tandem mass spectrometry(HS-SPME-GC-MS).A total of 56 volatile compounds,including 22 esters,11 alcohols,9 aldehydes,3 ketones,1 acid,3 alkanes,1 heterocyclic compound,1 pyrazine,3 benzene containing compounds,1 amine and 1 other compound,were isolated and their quantities determined...