Even pH 12 or so would do - this is the pKₐ of DMT.H⊕ (8.68) plus a few extra units for more complete deprotonation, as well as to take into account the shift of equilibrium that occurs once the freebase gets removed frob the aqueous phase. This pertains to the fact that DMT is 50% deprotonated at a pH of 8.68.I got all questions answered meanwhile except one
For StB I found explanation why to add more lye the necessary (cell break up or similar I think)
But for an A/B MHRB extraction isn't it better to just barely hit PH14?
And I really didn't find answer to it or maybe did oversee it.