The simplest way to separate the two is to boil off the DMT. You need accurate heating equipment for that though. Basically you put the two in a tiny flask and heat the flask slowly starting at 100 C. Every minute or so increase the temperature by no more than +5 C until the freebase DMT vaporizes away. You can use a large vapor bag attached to the flask to capture the DMT. Once vapor starts forming, keep the temperature constant until all the vapor is gone.
This works because DMT boils at a lower temperature than 5-MeO-DMT. This also works for separating DMT from bufotenine, and that's much easier to do.
Some others on this forum who love reading research papers all day are going to want "proof" this works because its not "documented" anywhere. Well, I AM DOCUMENTING IT RIGHT NOW. It works. SWIM has done this quite a few times now.
You can do this using a digital vaporizer, the kind that has a vapor bag and an accurate temperature gauge.
If you increase the temperature too quickly you'll vaporize both the DMT and the 5-MeO-DMT away. So increase the temperature slowly, not more than 5 degrees C a minute.
You may remember me as 69Ron. I was suspended years ago for selling bunk products under false pretenses. I try to sneak back from time to time under different names, but unfortunately, the moderators of the DMT-Nexus are infinitely smarter than I am.
If you see me at the waterpark, please say hello. I'll be the delusional 50 something in the American flag Speedo, oiling up his monster guns while responding to imaginary requests for selfies from invisible teenage girls.