Depends on if your shooting for pure d8 or a mix of d9/d8 and your starting material (distillate or isolate) as well as if your planning on running it in the boiling flask or if you plan to reflux with it before filtering it out and then distilling.
If using cbd distillate and going for pure d8 refluxing with ac for 4hrs per liter @180c distilling out the the same flask is your best bet.
If using isolate and T-5/T-41 in the boling flask you’ll ussualy make a distillate with around 10% d9 and 70% d8 with some mystery peaks like CBC that’s probably actually d10.
I haven’t messed around with citric acid yet but hear it can turn all cbd to d8 if heated with cbd distillate for long enough but it also can make a ratio of d9/d8 if refluxed in heptane under high vacuum or inert gas like nitrogen/argon.
Something I’ve been meaning to try is refluxing with T-5/T-41 in the boiling flask for longer periods of time before actually ramping up temps higher to pull the distillate. I have a feeling this may lead to possibly compliant d8 with higher levels of cbn and cbc/d10.
This is on my schedule for tonight. Got distracted today. My son was the only 8th grader from his high school selected for the science Olympiad team, so I came to the competition. Go junior!
I figured I’d try all the safer catalysts first. That’s on list two if T41, t5, ac, or citric acid don’t give me what I want from distillate or isolate.
Agreed here - Most of the side products will be oxidized “degradation” products that are unaccounted for by typical cannabinoid assays in the industry. Remember, there are generally only 14-16 commonly available cannabinoid standards in use at most labs.
yep. ideally you overlay the chromatograms. which means doing it yourself, or having a excellent working relationship with ones third party lab. I highly recommend the excellent working relationship, and encourage all licensed operators to gain In House analytics at the earliest opportunity.
Yeah, it was a 94.5%cbd 100%tac distillate so I figured I’d try it. I’m gonna make some isolate this week and try agin with that. I wonder if throwing it back in the still and rerunning it would make a difference? I haven’t washed it yet so there should still be some acid in there
Dealing with you question on the gc method, here are details (from memory, im not in front of the machine now)
I use 3 gas, air/He/H2,the carrier is He.
Injector and detector at 250c.
Inlet pressure at 29psi.
Column flow initialy at 3ml/min
Temperature program: start at 80c for two minutes, then ramps up to 180c at 30c/,min, and then to 280 at 10c/min, and then hold for 2 minutes. If it is a mct or other oil tincture, the 2nd ramp goes up to 320c, and holds for 5minutes.
This is a slow method (17 to 25 minutes), adapted from forensic studies (adapted from EU advised method), but I get a good resolution for the cannabinoids, and I can see a lot of the terps. It could be improved. I should also switch to H2 as carrier gas… maybe during the year, as my He consumption start to be significant since last year.
Edit: this was intended to be sent as mp, I posted here by error, Im ok with this but I hope this is fine for the topic.
I’m going to pick up the chromatograph from the test I posted above. Any help with interpretation when I can post it would be greatly appreciated! Too many unknowns and they don’t have a d10 standard, so I figured I’d go grab the graph so we can take a look.