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THC, the main psychoactive component of cannabis, may only be detectable in saliva and oral fluid for 2–24 hours in most cases. [8] [9] The main metabolite excreted in the urine is 11-Nor-9-carboxy-THC, also known as THC-COOH. Most cannabis drug tests yield a positive result when the concentration of THC-COOH in urine exceeds 50 ng/mL. [10]
The Duquenois reagent is used in the Rapid Modified Duquenois–Levine test (also known as the simple Rapid Duquenois Test), which is an established screening test for the presence of cannabis. The test was initially developed in the 1930s by the French medical biochemist Pierre Duquénois (1904–1986) and was adopted in the 1950s by the ...
These state laws fall into three categories: (1) "zero tolerance" laws, which criminalizes driving with any amount of THC and/or its metabolites in the body; (2) "per se" laws, which criminalize driving with a certain level of THC in the body; (3) laws that focus on whether the driver was actually impaired or affected by THC; and (4 ...
But Brubacher said the presence of THC, even at levels that exceed 2 nanograms per milliliter, does not necessarily mean the drivers were impaired and doesn’t mean marijuana use was the cause of ...
A 2022 study published in the Journal of Psychopharmacology found that participants given oral cannabis (the lab-grade alternative to an edible) showed low blood THC concentration at the height of ...
Cannabis product testing is a form of product testing analyzes the quality of cannabis extracts, edibles, and THC and CBD levels in an emergent consumer market eager to sell adult use products. [1] Analytical chemistry and microbiology laboratories are important entities in consumer protection.