[weedaholic721]

I thought some pictures might inspire more interest into this topic. These are not my pictures and hope it is ok that I post them. The pictured THC-acid is by guild extracts in collaboration with calilabs. I am assuming from looking at older pictures that they are using a method similar to yours Pangea, however there is very little info given.

[Pangea]

They are the only guys following me on IG, so its my assumption as well.

Thanks for sharing the pics, they look solid! wonder what they're selling them for?

[Gray Wolf]

Originally Posted by G.O. Joe

Has that preparation been analyzed yet for purity and identity?

We ran it through our GC and note the THC peak shifts to the left, but not other remarkable changes.

[heady blunts]

[live resin]

Originally Posted by Gray Wolf

We ran it through our GC and note the THC peak shifts to the left, but not other remarkable changes.

Exactly how are you using GC to quantify acidic cannabinoid levels? I assume you're using FID which decarbs the sample

[Pangea]

Restek has shared a method to use FID to quantify cannabinoid acids:
https://blog.restek.com/?p=15135

[G.O. Joe]

Originally Posted by Gray Wolf

We ran it through our GC and note the THC peak shifts to the left, but not other remarkable changes.

I still think years after the THC acetate discussions that refluxing THC with any concentrated sulfuric acid in organic solvent is a bad idea - definitely not something to teach unless the method is proven by analysis. Maybe bad idea isn't the right phrase and calling it THC acetate may be technically correct even, but if the product is the other isomer, then it should say so on the tin.

Labs probably wouldn't have a d8 THC acetate standard or feel like making one but the workaround is obvious. Hydrolysis of suspected d9 THC acetate with refluxing alcoholic KOH would of course give only the d9 isomer back, which the GC could compare to genuine d9 THC. This assumes that the GC method is proven to separate the two isomers as well.

[live resin]

100g plant material to (2 x 1500 mL, 99.9:0.1, v/v) n-hexane/glacial acetic acid

Dissolve crude product in 20 mL 2:1 chloroform/dichloromethane

Low pressure glass column 1560 x 24 mm

400g Sephadex LH-20; stationary phase/sample 30:1.

Each collected fraction is 50 mL

[Old Gold]

^ That was pulled from GW Pharma patent, correct?

[live resin]

Originally Posted by Old Gold

^ That was pulled from GW Pharma patent, correct?

No that stuff wasn't in the GW patent. This is from people at the University of Mississippi that were replicating the experiments and reviewing these patents