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Hair testing is commonly used in the USA as pre-employment drug test. The detection time for this test is roughly 3 months, which is the time, that takes head hair to grow ca. 1.5 inches, that are collected as a specimen. Longer detection times are possible with longer hair samples.
Delta 9 THC is the parent compound. If a saliva sample is tested in a lab, the detection level can be as low as 0.5 ng/mL (up to 72 hours after intake). [24] Per National Institute on Drug Abuse saliva drug testing provides a reasonable alternative to other drug testing methods. [25]
This includes random drug tests, even if someone was not high at work. After Amendment 3 goes into effect, employers still have the right to make their own company marijuana policies.
A 2000 study by the US NIST [6] examined 12 chemical spot tests and concluded that all the tests examined "may indicate a specific drug or class of drugs is in the sample, but the tests are not always specific for a single drug or [class]". The study also noted that "mace, nutmeg and tea reacted with the modified Duquenois–Levine [test]".
A new law says California employers can’t discriminate against employees for using marijuana in off hours. What does that mean? In 2024, California employers can no longer punish employees for ...
Integrity testing for employment selection became popular during the 1980s. [2] Human Resources personnel found integrity tests were an improvement over polygraph tests. Polygraph tests were no longer able to be used for screening of most future employees in the United States due to the Employee Polygraph Protection Act of 1988 (EPPA). [2]
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Its most widely accepted use is in the fields of forensic toxicology, in pre-employment drug testing and, increasingly, in environmental toxicology. [1] [2] Several alternative medicine fields also use various hair analyses for environmental toxicology, but these uses are controversial, evolving, and not standardized.