Abstract
Hyaluronic acid is a negatively charged polysaccharide with a high degree of polydispersity that makes the separation of its oligomers extremely difficult. Through the use of columns filled with a highly viscous polyacrylamide matrix, the unit resolution of hyaluronate oligomers could be achieved, up to at least 80 kDa of mass, through capillary electrophoresis. As analytical application examples, the fractions of enzymatically or ultrasonically degraded hyaluronates were monitored through this method. Because of the very high resolving power, peaks additional to the regular oligomers can be observed that are assumed to be conformers of this regular, unbranched biopolymer.
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