Objective:To test the acid-producing activity and stability of lactic acid bacteria starter cultures A and B by using iCinac acidification analyzer.Method:Dilute and inoculate the fermentation agent into the culture medium,ferment in a constant temperature water bath,and monitor the pH changes during the fermentation process using a pH electrode to evaluate the acidification activity of the lactic acid fermentation agent and obtain the acid production activity curve.Result:Compared with the traditional non-continuous pH measurement method,the iCinac acidification analyzer significantly shortened the test time,realized the continuous monitoring of the pH value of the fermentation process,and could intuitively reflect the acid production activity curve.The activity of each batch of starter culture reached its claimed acid-producing activity,and the acid-producing capacity and stability of starter culture A were better than that of starter culture B.Conclusion:The iCinac acidification analyzer provides reliable technical support for the quality control of lactic acid bacteria starter culture,and can be widely used in the fields of starter culture quality control,fermented dairy product process optimization and strain screening optimization.
lactic acid bacteria fermentiCinac acidification analyzeracid production activitystability
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