Expert checking in...

To get a good breakdown of all the psychoactives in a given weighed and properly extracted sample, here's the simplified SOP that I would use:

Dry bud in a controlled-temperature lab oven at 80'C for 4 hours.
Weigh out exactly one gram of bud on an analytical balance.
Place it into a kiln-baked glass vessel containing ample hexane to fully immerse the sample. Other solvents may be used but will require a solvent-switch step before analyzing. Vortex, centrifuge, and decant supernatant into a second clean glass vessel.
Repeat wash steps two more times, reserving pooled supernatant.
If UHP isopropanol was used, you will now do a solvent swithc. Blow down the pooled sample under N2 in a Rapid Vap or Rotovap to near dryness at 60'C. Bring back up to 10mL with hexane.
Blow sample back down to exactly 1mL and transfer to a hexane-rinsed sample vial. Add your internal standard at a concentration and volume so as not to interfere with analysis or create significant dilution.
Buy a gas chromatograph. Agilent makes a good one which will only run you about $160,000 installed with a service contract. I don't recommend their software though. Spend the extra six grand and buy the Chromeleon package made by Dionex, because with that many eluting peaks in a sample, you don't want to fuck with the tedious load times and inelegant baseline correction utility that comes with the insturment.
You're also going to need an analytical column. This, you're going to have to research yourself. You'll want a reasearch grade column that is capable of separating the individual psychoactive congeners, unless you only care about total resins in the plant, but in that case you may end up with interferences from the aromatic terpenes. That is something you will have to work out with your oven/detector/flow rate programming during method development. You may even want to choose a dual-column system that allows coeluting peaks to be verified by the second method.
Run a set of calibration standards. Check the AccuStandard catalog for drug-lab supplies. Check your calibration curve- identify all peaks and enter true values into the calibration table. I recommend at LEAST a 4-point curve, including the blank.
Run your samples. Adjust the baselines. Quantify.
Enjoy.

:jointsmile: