Dissolving Amino Acids in Scintillation Fluid

Phil Calvert calvert at eos.ncsu.edu
Tue Aug 12 01:49:37 EST 1997

I hydrolyzed some protein with HCl and passed the hydrolyzate through a
small ion-exchange column.  The amino acids were then eluted with 4M
ammonium hydroxide.  When I tried mixing this with scintillation fluid
(Ultima Gold) it became very cloudy.  I figured it must be the ammonia, so
I blew it down to dryness with nitrogen.  Well, I still couldn't get it to
dissolve properly.  This makes sense because amino acids don't dissolve
very well in organic solvents, generally speaking.  Is there a trick to
this?  I was thinking that maybe using a co-solvent like DMSO, DMF,
pyridine, etc. might work, but this is just a hunch.  Any suggestions?

!-----------Phil Calvert-----------!
!---calvert.NoSpam at eos.ncsu.edu----!
NOTE:  If present, the phrase ".NoSpam" must be removed from my
return address before sending your reply.

More information about the Methods mailing list