some one said:
I'm about to start experimenting with sunflowing oil as NPS and backsalting to vinegar. Could use some tips.
1: should I do the NPS pulls at room temp or heated? 40C?
2: how much NPS volume to use per pull? 50ml for 50g bark?
3: how long should each pull last? 45min?
4: how many pulls to perform? 4 pulls?
Say I extract 50g MHRB with 4x 50ml NPS pulls, that's 200ml sunflower oil containing 1g DMT which is to be backsalted. I'd want to keep the acidic solution volume as low as possible for faster evap.
5: what acidic solution volume and max pH should I use for the example above? 100ml @ pH <4?
6: how long should I let the back-salting occur? 30min?
7: after separating the acidic solution for evap, should I add new acid to the NPS and repeat? Don't think so.
I'm currently finishing an extraction of ACRB with sunflower oil with a bit of limonene added (apparently this still offers the anti-emulsion benefits of limonene without the high cost of using limonene only).
I like the eco-friendly aspect of it, but pulling with oil is a bit messy... It sticks to the walls of the turkey baster etc., and much of it will end up in your collected aqueous backsaltings. You'll want to run the combined backsaltings through a coffee filter to get rid of the oil layer. And then evaporate the aqueous solution completely, or at least to a solid / goo; the evaporation removes the most unpalatable compounds.
I'm not good with numbers when NPS pulls are concerned, I still haven't gotten this down, but I understand sunflower oil holds more DMT than naphtha.
To try to answer your questions:
1. Room temperature works fine. Heated pulls make sense in the case of naphtha and freeze precipitation, where you want a high temperature differential to maximize the difference in solubility between hot and cold, and, consequently, freeze precipitation yields. Since you're not freeze precipitating here and tryptamine solubility in room temp oil is still good, no need for heat.
2. Since you're not freeze precipitating, an excess of NPS shouldn't hurt and may reduce the number of pulls needed. With my current ACRB extraction, I'm doing 75 grams of bark in ~300 ml basic soup, my NPS volume is probably around 75 ml.
3. 45 mins should be fine. Use a magnetic stirrer.
4. I hope someone can answer this question for you and for me! In my extraction I did 8 pulls, but the last couple were almost colorless, so it was probably overkill. As I said earlier, more NPS may reduce the number of pulls needed. I feel 4 pulls should be sufficient to get most of it out.
Don't worry about evaporation speed; my combined backsaltings were in the order of 700 ml, but that's quick to reduce in a stainless steel pan to a small volume, which you can subsequently transfer to a tray and evaporate in a dehydrator or the like.
5. For me, the first wash is maybe 10 ml 5% vinegar + 10 ml water.
6. I think 5 minutes is plenty. See the tek on the Wiki.
7. I do 2 or 3 more washes, this is with water with a dash of vinegar added to ensure reasonable acidity so most of the DMT is in salt form.