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An analytical method has been proposed to quantify the D-lactide content in a lactide stereoisomeric mixture using combined gas chromatography and polarimetry (GC- polarimetry). As for a lactide stereoisomeric mixture, meso-lactide can be determined quantitatively using GC, but D- and L-lactides cannot be separated by the given GC system. The composition of a lactide stereoisomeric mixture is directly...
A method of quantitatively determining the D-lactide content in L-lactide using combined gas chromatography(GC) and high performance liquid chromatography (HPLC) was developed. The meso-lactide and total D- and L-lactide contents were determined by separating meso-lactide from lactide using GC. However, D-lactide and L-lactide exhibited overlapping peaks in the GC curve. The D- to L-lactate unit ratio...
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