Abstract: GC-MS was used to analyze the components of wheat-stalk vinegar, and the anti-microbial functions were studied. The results showed that wheat-stalk vinegar was a liquid mixture containing 70 kinds of components. The main components of wheat-stalk vinegar included phenolics (28.68%), organic acids (22.16%), ketones (21.22%), alcohols (4.00%), aldehydes (1.44%), etc. The results of inhibition-circle experiments showed that the diameters of the inhibition circles for two kinds of bacteria (Escherichia coli and Staphylococcus aureus) were 10.2 and 9.2mm respectively. Both of the two contrast samples did not have inhibition circles, which demonstrated that wheat-stalk vinegar has definite anti-microbial effects toward E.coli and S. aureus, and it is a favorable antimicrobial agent.

Key words: wheat-stalk, vinegar, bacteriostasis