Effect of citric acid on organic acids production in the process of beer brewing

The production of organic acid including succinic acid,malic aicd,α-ketoglutarate and tartaric acid was studied in the presence of citric acid.The results showed a decreased production of succinic acid,malic aicd and tartaric acid by addition of citric acid,in which the strongest effect was on succinic acid production,but there was almost no effect on tartaric acid production.Only 77.24%,85.92,84.22% and 71.01% of succinic acid,malic aicd,α-ketoglutarate and tartaric acid was produced comparing with control.