I was just wondering if anyone knows why (~250mM) NaCl is almost always the starting salt of choice for buffers. Why not ammonium sulfate, MgCl2, KCl, or KBr? Is it just because NaCl is the cheapest and most abundant? If so, are there other, more optimal, salts out there that we could be using? I have read a little about the hofmeister series, and from what I have read on that it seems as if using low concentrations of ammonium sulfate would be a good thing, but then again I am likely misinterpreting what I have read. That said, if any of you have advice or input regarding this please post away. It is welcomed.
Edited by feldman, 26 April 2011 - 05:55 PM.