SWIM has done an STB side by side with an A/B tek and found no gains in yield or purity in the A/B, but only more work.. Thats why SWIM wont do an A/B extraction with mimosa root bark, its unnecessary. With other things, he could do.
Entropymancer said:SWIM doesn't use a tek, he just freehands the extraction. He prefers A/B extractions, since mixing the naphtha and nonpolar layer can be done more thoroughly without forming emulsions in a sep funnel, and you can't use a sep funnel doing an STB (with naphtha). Also, he doesn't find A/B to be any more work than STB.
What SWIM does: Break up bark in a saucepan. Cover with water and add a bit of citric acid to acidify to pH 4-5, leave on a low simmer for a couple hours. Pour off the water, cover bark with fresh water and a fresh pinch of citric acid, simmer on low for a couple hours, pour off the water. After one more round of simmering with fresh acidified water, the bark is discarded, and all extractions are pooled together in the saucepan and left simmering for several hours until they're down to 400-500 mL. This is then left overnight to allow fiber/particulate to settle into a cake at the bottom. (So far, the process has only taken about 15 minutes of active attention). Next, a strong solution of NaOH is mixed and added gradually to the acidic extract, until it changes to a dark slippery black, at which point the solution is saturated with NaCl. This goes into the sep funnel with some heated naphtha. Only one pull is done at a time, so that the supernatent can be re-used for the next pull after freeze-precipitation.
SWIM doesn't weigh/measure anything (except for the final product), and doesn't even check pH after getting a feel for how much citric acid it takes to appropriately acidify the water for the initial extractions.
Entropymancer said:A pH of 4-5 is plenty low enough to make sure all of the DMT is in its ionized (water-soluble) state; I'm not sure I understand the logic in acidifying down to pH 1.5. Even water which hasn't been acidified should still be relatively effective at pulling the spice out of the bark.
If SWIM had to guess on the citric acid, he says it's probably somewhere around/under a tablespoon per liter.
The NaCl is used with the intention of keeping emulsions at bay, though it may also shift the partition coefficient slightly in a favorable direction (pushing the alkaloids, as you put it).
Infundibulum said:One could be actually using a A/B - STB hybrid; id est, soak the powdered/shredded bark in water containing 1-2 grams of ascorbic acid for a day or so. Then add enough NaOH for a standard STB, pull 5-6 times using xylene, and salt the alkaloids out using FASA. Fumarates can be converted to their freebase using calcium hydroxide paste and acetone.
This method could produce spectacular results, it has been quite a few times the subject of some intense dreams where yields reaching easily to 2% of total alkaloids in bark has been a recurrent theme. No need to separate pure white spice out of the alkaloidal mixture; it's both a waste of time and loss of the intense experience brought by the smoked synergy of all MHRB alkaloids.