NIGHTMARE ON CANYON'S STREET
Five buds walked into a bar....ok, no.
For now, I am only addressing the THC extraction. Terp tests are not back. Therefore, my numbers are only addressing THC & THCA and CBN (well, because).
Methodology
A 2g sample was generated by selecting several buds, breaking a piece off each to make a more uniform sample.
Lab Results for Buds
Note: Numbers will change slightly throughout due to testing limits and rounding. We are talking tenths here.
Lab tested Nightmare Cookies: 23% THCA, 0% THC (Canyon's the man)
After decarb expectation = 20% THC
Accounting for 9% moisture from a previous test brings the figure to 22.2%/g
This translates to a to an available 222mg/g of THC.
Decarboxylation Methodology
Nova Decarb Unit
Lab Results for Decarb
THC: 22%
THCA: 0.41% (1.8% not decarbed) Not bad really
Potential THC: 22.36% (THC+THCA x .88)
THC: 1118mg Available
2 Hr Extraction Methodology
58ml Coconut oil
5g decarbed bud
Stirring frequently
Crock pot
Lab Results 2 Hr Extraction
CBN: NOT Detected! 0.060% was shown after decarb
THC: 14.1mg/ml
THCA: 0.152mg/ml 0.166mg/g (Started at 4.1mg/g. Gained additional decarb of 3.9mg/g. Equates to 96% decarb of THCA while in the oil.
Dreggs (Spent Mtl) Methodology
Exactly the same as the extraction.
Apx 8ml oil trapped in the material. @ 14.25mg/ml = 112.8mg THC
Added 15ml clean carrier oil.
Total oil: Apx 23ml
Lab Results Dreggs (spent material)
CBN: NOT Detected! (0.060% was shown after decarb)
THC: 6.2mg/ml 6.8mg/g
THCA: Not Detected (0.152mg/ml was in extraction)
CBG: 0.22mg/ml (None before)
Conclusion
The 8ml of trapped oil had 112.8mg THC.
15mg fresh carrier had 0mg THC.
In the 23ml of oil a concentration was found to be 6.2mg/ml (112.8mg). This makes the THC 142.6mg. Subtracting the 112.8mg from the 8ml of trapped oil, reveals an additional 29mg was extracted. This suggests, since there is no CBN that a 4hr extraction may be better. Not much gain, but no trade off.
There was 2ml oil that got away, almost certainly post infusion. So, there's another apx. 12.4mg that was extracted. Consequently, the extraction rate was apx. 78% at best. (1118mg available -867.9mg extracted = 250.1mg (22%) presumably still in the material at this point. BTW, we would not have left this mystery but we didn't know the lab had the ability to test oil soaked material.
The stronger you make your oil, the bigger the problem with loss due to handling becomes. (Stirring utensils, pouring from one container to another, etc.) If we were shooting for 50mg/ml, we would have lost a whopping 100mg just from handling the oil. That would have been one hell of a Saturday night for someone! Keep in mind, I went to a great deal of trouble to keep the loss that low. The devil is always in the details! And that would be a whole course in itself.
Perhaps even 6 hr would be a better choice but I suspect there will be little gain and possibly some loss by then. I would like to point out that the oil had a decent flavor. No overpowering chlorophyll taste.
The answer to a more efficient extraction lies elsewhere IMHO. I think I am already on to the solution of running it up to apx 95%. Beyond that, I don't know. Oil will never be as efficient as say, Ethanol; probably due to viscosity. However, oil is SOOO much safer & cheaper for kitchen extractions. It's possible that the material could still be forced to give up the rest. I'm working on that too. Actually, I already know. But I'm looking to stay within the kitchen. That was the point of this particular exercise. Then there would be little to argue about.
Failures & Follow Ups
Due to an unfortunate malfunction of the tcheck device, we were unable to test whether additional extraction time would have helped. I know some of you do extremely long extracts with FHO. I have not seen any tests performed to validate those results. We were also unable to test whether a 2hr presoak in the carrier oil would have helped for the same reason. These were multiple tests that we wanted answers to but were counting on tcheck tests to verify. When the tcheck is replaced, I will check for the longer extraction time. Also, someone needs to test the spent mtl. If you do that, squeeze out all the oil you possibly can before testing.
So guys, there it is. Hope you all learned a little something. And on behalf of Canyon and myself, thank you to those who helped with the finance!