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Cannabis use is detectable with hair tests and is generally included in the standard hair test. Hair tests generally take the most recent 1.5 inches of growth and use those for testing. That provides a detection period of approximately 90 days. [5] If an individual's hair is shorter than 1.5 inches, this detection period will be shorter.
Hair drug testing is a method that can detect drug use over a much longer period of time than saliva, sweat or urine tests. Hair testing is also more robust with respect to tempering. Thus, hair sampling is preferred by the US military [66] and by many large corporations, which are subject to Drug-Free Workplace Act of 1988.
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 ...
A new California law prohibits most employers from using the most common kind of drug testing for marijuana use. Here’s what it means for you.
The findings dovetail with scores of complaints that two private cannabis testing labs have filed over the last eight months, reporting pesticides in products certified by other labs as safe. The ...
The Oklahoma Medical Marijuana Authority is working to open a state-run testing laboratory to verify product safety. The lab, located in Oklahoma City, is expected to be operational by early February.
Psychemedics’ standard test uses a 1 ½ inch sample of head hair, which provides an approximate 3 month history of drug use. Body hair can also be collected if head hair is not available. [2] Psychemedics hair tests are available in Brazil through the company's independent distributor, Psychemedics Brazil.
The time frame in which marijuana testing laboratories must report the presence of pesticides in a product batch. The state says it is within 72 hours of finding the substance, the commission says ...
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