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I called the monomer-polymer company, their low MW PSS is 25 k, with polydispersity of 3, 250 g for 50 bucks. We may use it, the MW distribution is kind of broad. I think for now, we will buy a GPC standard and use it in our current study, although it is expensive, and in the future, we will...

Folks, I am looking for low MW (<20 kD) sodium polystyrene sulfonate (PSS) for coating nanoparticles. The widely availble molecular weight is 70 kD, but with this molecular weight, dialysis cannot be used for purification. The ideal MW should be less than 20 kD. I know about the suppliers of...