Pure lactic acid is a colorless liquid, is a colorless to pale yellow liquid. Odorless, hygroscopic. The relative density of 1.2060 (25/4 ℃). Melting point 18 ℃. Boiling point 122 ℃ (2kPa). Refractive index nD (20 ℃) ??1.4392. With water, ethanol, glycerin, insoluble in chloroform, carbon disulfide and petroleum ether. Heating under normal pressure, concentrated to 50%, part of the anhydride into milk, thus products often contain 10% -15% of the milk anhydride.
2013年8月23日星期五
Lactate ions have antibacterial functional groups
Lactate rat damage, Salmonella and Staphylococcus aureus inhibition, at present, mainly used lactate corrosion from within, potassium sorbate in meat very wide application, is that it should make a false charge antibacterial and microbial enzyme system The group combined, Zinc lactate many important enzymes seconds, to inhibit microbial growth and corrosion purposes, potassium sorbate preservative in meat can be used alone, but also, and phosphate, acetic acid conjugation.Recently the use of sodium lactate is still very limited. USDA that lactate is safe, maximum use of up to 4%, buffered lactic acid has two corrosion mechanisms, sodium lactate can be added to reduce the water activity of the product, thereby preventing the growth of microorganisms; lactate ions have antibacterial functional groups.
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