The preservative principle of preservatives is that it interferes with the microbial enzyme system, destroys its normal metabolism, inhibits the activity of the enzyme, and causes the microbial protein to coagulate and denature, interfering with its survival and reproduction. At the same time, it can also change the permeability of the cell serosa and inhibit the elimination of enzymes and metabolites in the body, leading to its inactivation.
There are strict regulations on the use of preservatives in China, which should meet the following standards: reasonable use is harmless to the human body; does not affect the digestive tract flora; can be degraded into normal components of food in the digestive tract; does not affect the use of antibiotics; No harmful ingredients are produced.
So far, 32 kinds of food preservatives have been approved in China, among which sodium benzoate and potassium sorbate are commonly used. Sodium benzoate is more toxic than potassium sorbate, and its bacteriostatic effect is only 1/3 of that of sorbic acid at the same acidity value, so potassium sorbate is gradually used in many countries. From the development trend of preservatives, biological preservatives made from biological fermentation will become the future development trend.www.china-zhufengchem.com