Hi, in some preliminary test we used to extract cannabinoids fraction from the oil using methanol as solvent. Depending on the range of CBD and THC you expect to have in your product you can adjust the ratio of OIL:METHANOL to get a good recovery rate from the oil. You can try with different solvents if your intention is to analyse also for other secondary metabolites present in the oil.

Thanks Davide. I really appreciate your help

what exactly is the question? for general HPLC CBD analysis, you can refer to the following articles:

https://plygenind.com/4-ways-to-analyze-the-identity-and-purity-of-cannabidiol-cbd/

https://www.unodc.org/documents/scientific/ST-NAR-40-Ebook_1.pdf