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antigen retrieval in IHC - (Jan/24/2007 )

I need to make up 10mM sodium citrate buffer, pH 6.0 and 9.0 for antigen retrieval. My question is this: does anyone know what the normal pH of this solution is and what do you use to make adjustments to the pH?

-fisher girl-

we used to have an antigen retrieval sol. with Tris at pH 9.0

we used HCl or NaOH to adjust pH.