Yes, but such tests still can’t determine if you are intoxicated. All they can say is if you may have consumed marijuana sometime in the last 2-6 weeks or so. Obviously, you don’t stay intoxicated for 2-6 weeks after ingesting marijuana, so the tests can’t actually tell us that.
But I can try!
I kid.
As an aside: They are developing new strains of pot constantly. CO requires analysis of them, because they now categorize pot as a food product (an "ingestible"). The result is that we know the specifics of the actual components on pot. The THC is merely one of many components; many of these components have much interest to the medical community, specifically the terpenes Linalool, b-Caryophylene, Pinene, and Myrcine.
These terpenes are all present in other foods and plants; Linalool, for instance is the component of lavender that gives it its' relaxing properties. Myrcine is present in Mangoes. Pinene, big surprise, is present in pine trees.
The crux: soon there's going to be pot with zero THC. It is coming; it is inevitable due to market forces (people want it).
My query to FReepers who are anti pot: Will your hostility to pot transfer to pot with no THC? Because it will still make people feel good, even without the THC.