1, potassium sorbate reacts with perchloric acid to produce white precipitate of potassium perchlorate.
2. After potassium sorbate is dissolved in water, add water-insoluble ether and titrate with hydrochloric acid standard solution. Because the sorbic acid produced in the titration process has low solubility in water and high solubility in ether, the sorbic acid produced by titration can be continuously extracted into the organic phase, thus reducing the dissociation of sorbic acid and making the titration reaction complete.
Extended data
Sorbic acid (potassium) can effectively inhibit the activities of mold, yeast and aerobic bacteria, and also prevent the growth and reproduction of harmful microorganisms such as Botox, Staphylococcus and Salmonella, but it is almost ineffective for beneficial microorganisms such as anaerobic Bacillus and Lactobacillus acidophilus.
Its function of inhibiting development is stronger than sterilization, thus effectively prolonging the storage time of food and maintaining the flavor of original food. Its anti-corrosion effect is 5- 10 times that of the similar product sodium benzoate.
References:
Baidu encyclopedia-potassium sorbate