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Cannabis drug testing describes various drug test methodologies for the use of cannabis in medicine, sport, and law. Cannabis use is highly detectable and can be detected by urinalysis , hair analysis , as well as saliva tests for days or weeks.
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 United Nations as the preferred test for cannabis. The test was originally claimed to be specific to cannabis. After several modifications, it became known as the Duquenois–Levine test.
Cannabis testing is also required in other states, such as California, [16] Oregon, [17] Massachusetts, [18] and Nevada. [19] Washington State added routine pesticide testing and random or investigation-driven heavy metal testing, formerly required only for medical cannabis, to its testing suite for all cannabis on March 2, 2022.
The lab, expected to be fully operational in 2025, will verify potency as well as testing for contaminants like pesticides, heavy metals and mold. Missouri will begin testing marijuana products at ...
Anresco also agreed to test products for The Times and WeedWeek, as did a Santa Cruz-based cannabis testing company, SC Labs. Reporters bought products from dispensaries across the state, choosing ...
Under California’s new law, employers are required to test for marijuana use among employees with tests that determine current impairment, not just previous use. Kentucky’s new medical ...
A 2014 collaborative US study of 359 adults with moderate-risk drug use found, that a large number of participants, who reported drug use in the last 3 months, had negative hair tests. The tests were done using an immunoassay followed by a confirmatory GC-MS. For marijuana, only about half of self-disclosed users had a positive hair test.
As more laws allow the use of this drug, it is well worth considering how this will impact the safety of drivers, including whether our current methods of testing for THC (tetrahydrocannabinol ...
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