http://www.pharmanet.com.br/pdf/drugdelivery.pdf (http://www.pharmanet.com.br/pdf/drugdelivery.pdf)
Post 126328 (missing)
(oilman: "Re: "The Cure" for all Oz pseudoephedrine pills", Newbee Forum)Using OH and base is just one trick I'd use in a clean, depending on what Fester says. But I have many.
I've done some posts of my results doing just that. Cthulhujr took the STB and used dried alcohol to mobilize the base. I had used dried acetone. Both in fact do work to mobilize the base without water. The waterless approach to basing also helps keep PEG at bay in the STB; nothing beats preextraction boils in naptha, IMHO. Take the PEG out, use Na2CO3 to base, mobilize the base with a 50/50 mix of dry ISO and dry Acetone, and you may find as I did that you bring fewer polymers with the pseudo.
I also have the thought that the tendency of the tetra trap method to bring the PEG with the pseudo may be related to the use of the water to mobilize the base. I have not had an opportunity to do a modified tetra trap, trading dry ISO and/or a mix of dry ISO and acetone to mobilize the base. Add the alky/tone mix, then the naptha or tolly, add more alky/tone after decanting the first pull, stir, then add more solvent to extract. I haven't tried it yet. With the generic 120's I obtain, this may be needed to limit how much PEG gets pulled; it may still be necessary to take the PEG out with a couple of naptha boils.
Sorry, my comments ran long. I did want to suggest you review some of my earlier efforts at mobilizing the base with acetone or a mix of alcohol and acetone, as the information may be of use to you.