Analysis of organic acids in aerobic solid-fermentation culture of Shanxi Super-Mature Vinegar

In the experiment,the research objects were the different ferment stage of solid-fermenters of Shanxi Super-Mature Vinegar.Main physicochemical indexes(moisture content,total acidity and pH value) and sour substances(organic acids) were analyzed.The results showed that during the fermentation process of the solid-fermenters of vinegar the moisture content between 61% and 64% was determined,pH value was between 3.52 and 3.72,the acidity was between 6.37% and 12.17%.The HPLC analysis results indicated that the content of acetic acid,lactic acid,succinic acid,malic acid and tatol organic acid showed a obvious growth trend along with the process of acetic acid fermentation,the content of oxalic acid,tartaric acid,pyruvic acid and fumaric acid in the fermentation process was not high,and the change trend was not obvious.