Use propane
Use terp extraction equipment to pull the Terps out first then extract for the thca with propane and the re combine to whatever formulation your heart desires.
You can crystallize thca in botanical terps instead of recognized solvent
This would be my play
wow. good luck with thatâŚ
getting down into the 100ppm range isnât too rough on your extracts, but the 3rd party lab weâre currently using has their LOD at 1000ppm because OR decided 5000ppm butanes was cool for huffablesâŚ
the lab I was using for R&D had their LOQ at 100ppm and LOD at ~80ppm. about 1/2 my samples showed non-detect.
having in-house analytics so I could actually see what each stretch in the vacuum oven was doing to my terpene profile vs the residual solvents was extremely helpful.
I would keep the temps down, and run a controller on the vacuum (or at least a real gauge). separate your HTE and purge the fractions separately (you wonât need to be as gentle with the THCA).
SRI 310MM was able to see butane & propane in the samples that were ND (below 80ppm) and should be able to guide you to the range youâll need. Along with a providing a qualitative look at your terpene profile. to achieve quantitative, youâll need more. Iâve got a couple of headspace auto-injectors, and getting quantitative headspace on my terpenes & residual solvents is on the listâŚbut Iâve got a huge list of projects with higher priority atm.
Iâm sure I can dial in something to get to ND, Iâm just wondering what the final product will taste like.
Iâm leaving corporate hell in search of a job to make something I care to smoke, you know?
We have some SOPs to reach ND and preserve terpenes, definitely a more costly and time consuming process but it is possible.
good calls.
limonene is usually the first suggestionâŚUsing Limonene as an alternative to hexane for CBD Isolation
although there are probably better options.
This could indeed be another source.
Still I believe those âmystery oilsâ are more likely to originate from the extraction solvent.
If I was in your position I would take all my extracts into a crumble form and then post process beyond that into shatters/sugars/thca isolates ect. seeing as you can hit 5 ppm with a crumble sop without ruining the terp profile in the oven.