How to successfully precipitate PLGA-PEG from PLGA-NHS. Precipitation troubleshoot?

I am trying to make PLGA-PEG nanoparticles. For this, first I make PLGA-NHS from PLGA-COOH bu using PLGA-COOH , NHS and EDC in DCM. I precipitate it (PLGA-NHS) using Methanol. Further, I use this...

12 May 2016 7,484 4 View