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2. Drug test - Wikipedia

   en.wikipedia.org/wiki/Drug_test

   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.

3. Cannabis drug testing - Wikipedia

   en.wikipedia.org/wiki/Cannabis_drug_testing

   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.

4. Hair analysis - Wikipedia

   en.wikipedia.org/wiki/Hair_analysis

   Chemical hair analysis is used for the detection of many therapeutic drugs and recreational drugs, including cocaine, heroin, benzodiazepines and amphetamines. [3] [4] Hair analysis is less invasive than a blood test, if not quite as universally applicable. In this context, it has been reliably used to determine compliance with therapeutic drug ...

5. Psychemedics Corporation - Wikipedia

   en.wikipedia.org/wiki/Psychemedics_Corporation

   Hair grows at approximately the rate of ½ an inch per month and takes about 5 days to grow out past the external layer of skin. 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]

6. 3,4-Methylenedioxyamphetamine - Wikipedia

   en.wikipedia.org/wiki/3,4-Methylenedioxyamphetamine

   Some drug abuse screening programs rely on hair, saliva, or sweat as specimens. Most commercial amphetamine immunoassay screening tests cross-react significantly with MDA and major metabolites of MDMA, but chromatographic techniques can easily distinguish and separately measure each of these substances.

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