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This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
The fraction of antigen not released from microparticles in vitro during the soluble release phase can be accounted for via nitrogen analysis. Approximately 70% of encapsulated OVA was released as soluble antigen by day 35 from micropaticles. The remaining samples mass was found to contain approximately 27% of total encapsulated OVA, for 97% total recovery. ±SEM