I'm sorry, I don't recall the name of the tribe that performs the water extraction. There are many different tribes with various methods of preparing epena. I saw a video of the water preparation once, and also one of the books I have on the subject also talks about that technique. I don't recall which one (I have dozens of books on the subject). Some use the bark, some use actual liquid sap, some use dry resin, there's a bunch of methods documented.
Look here, it talks about a similar method used:
http://leda.lycaeum.org/?ID=16018
What’s available to the natives and what’s available to the rest of the world may not be identical.
What I'm interested in is not what the natives have, but rather what’s available to us on the internet marketplace. What does that resin have? What does that bark have? Very few westerners will ever get stuff directly from the natives, but instead they’ll get what’s being sold on the internet. Most of the reports of the material being sold on the internet from various SWIMs seem to indicate an almost complete lack of alkaloids in the bark. Some SWIMs have had good results with the resin being sold, but most have not. Many reports exist showing the resin to produce no effects at all.
I’d like to see some tests done on what we have access too. If resin in the jungle contains 10% 5-MeO-DMT, then why doesn’t the resin we have access to contain 10% 5-MeO-DMT? All of the SWIMs that have reported use of the resin indicate that none of the resin available on the internet contains anything near 10% 5-MeO-DMT.
SWIMs own tests have not found resin to contain anything near 10% 5-MeO-DMT. So what’s up with that? I wonder was that just a mistake in the lab tests? Maybe that 10% figure was actually 1% and a decimal was moved mistakenly? Those kinds of mistakes happen all the time. One test by one person is just not enough to go by.
Now if we had 10 tests performed by 10 different groups all showing a 5-MeO-DMT concentration on about 10% in 10 different samples of pure resin, then of course there’s no arguing about it, it’s a fact. But one report of 10% and a vast amount of SWIMs indicating 10% is completely wrong, well then you have a problem with that test's credibility in my eyes.