Don't just melt the DMT in glass placed into boiling water. You need to put a small amount of of naptha into the glass and then put in the DMT until it dissolves. Now take the naptha out and put it into a freezer. The DMT is not soluble in naptha at these low temperatures and the crystals will come out of the solution. After being in the freezer for a couple hours take it out and pour the naptha through a coffee filter along with the crystals. The naptha will go through and the crystals will stay on the filter. Leave 24 hours to let the naptha from the filter evaporate. Dispose of the naptha you poured through the filter or freeze it again to make sure you got it all This is the best way I've found to purify DMT. Been awhile though and I might be forgetting to mention something but this sounds right. If you want to know if your DMT has sodium in it just burn a tiny bit and if it burns yellow there is sodium. When you did your extraction did you use high quality solvents? I mean, if you used zippo lighter fluid or something for naptha there can be all kind of contaminants and when the naptha evaporates they'll be left in your product. Same goes for using shitty lye from drain cleaner or whatever. That isn't lab quality stuff.
What color would it burn with no sodium? As far as the solvents, they were high quality. The lye I had was 100% NaOH and I would never use zippo lighter fluid....
^^ I'm not sure what color it would burn honestly. I've never done it because I've never been worried about impurities. I also wanted to mention that during that process I mentioned above you can stick a large crystal of DMT into the naptha after it's chilled a bit but before the crystals start coming out and it will act as a seed crystal. Then once all the crystals come out take your "seed crystal" which should be larger now and take it out. Let the naptha go back to room temperature so the DMT goes back into it. Then repeat the whole process again. If you do this over and over you can get huge shards of DMT. Kind of cute. Oh and I forgot to mention that right at the start of what I said you do need to heat the naptha/DMT contained in a glass container by submerging it in near boiling water. The point of this though is that you use a small amount of naptha and heat it to increase the solubility of DMT so that when you freeze it the crystals explode out of it. You could just put the DMT in room tempertature naptha and it would dissolve but it would take more naptha to hold it. Get the idea?
bestine (heptane) rubber cement thinner > naptha much lower b.p and it's cleaner, excellent for recrystallization