please allow me to elaborate..at any given pH, you will have three or four phosphate ions, which will bind any charged molecules in the aqueous solution.
once you basify, the salts will remain in the aqueous solution, and you can pull DMT and re-x. what I was alluding to is salting a dirty extract, like a plant source with a wide alkaloidal profile, or doing A/B/A.
it's just much simpler, and efficient, to work with monoprotic acids.
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