Which isomers? Define “detect”…
You have read the part where most (purhaps less these days) third party labs still haven’t wrapped their head around the concept that they’re not looking at CBC? THC Imposters (Isomers)
Yes, any of these isomers should run through the tubes. Yes, they absorb UV.
So yes, you can “detect” them in an hplc. It is “identifying” them that might give you problems…