test for the determination of lactic acid quality; process for the separation and purification of polymerizable lactic acid from fermentation broths; and use of lactic acid

摘要

test for the determination of the quality of lactic acid; process for the separation and purification of polymerizable lactic acid from fermentation broths; and use of lactic acid The present invention describes a test for determining the quality of lactic acid comprising a) means for polycondensing lactic acid to form a prepolymer, b) means for depolymerization to form dilated, and (c) means for performing analytical methods for determining dilatide yield and / or racemization, wherein the lactic acid, which is subjected to the test and is suitable for polymerization, has a dilactide yield of. 90% and a racemization of 5%.