> isolation of freebase from post rx mixture is a bit difficult
have you tried filtering through celite (=diatomaceous earth, kieselgur)
after basification? works like a charm. when clogged, just scrap the
surface until you can see the white celite layer.
then you can for example evap the alcohol, separate the freebase,
take up in dil. HCl and continue with the usual A/B.
must read on the subject: Post 384725 (https://www.thevespiary.org/talk/index.php?topic=9721.msg38472500#msg38472500)
(Chromic: "Celite", Methods Discourse)
Follow the chiefs advice about the gassing bottles. ;)
Post 443917 (https://www.thevespiary.org/talk/index.php?topic=5461.msg44391700#msg44391700)
(abolt: "Cool info, Buster", Chemicals & Equipment)
As your pump is not working.............can I assume that the reason you are not getting a gram for gram yield is due to undistilled p2p?