Some think the proposed set of draft rules, if they become enforced, would create unnecessary burden on the market, raising prices and limiting availability.
Because terpenes are somewhat volatile, the Restek team recommends using gas chromatography and advises against using HPLC for terpene analysis.
A brief history of the QuEChERS extraction method and its application in pesticide residue testing for cannabis
The workhorse approach for pesticide residue analysis involves using gas chromatography and liquid chromatography tandem mass spectrometry (MS/MS) in the ion transition mode.
The recent round of The Emerald Test, an industry-wide proficiency test for cannabis labs, yielded positive results that show an improvement over last year.
For potency analysis via HPLC, grinding/homogenization and alcohol extraction is a common sample prep technique for dried flower and extracts.
Near Infrared can be used to monitor growth & curing processes for R&D.