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  2. 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.

  3. Drug test - Wikipedia

    en.wikipedia.org/wiki/Drug_test

    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.

  4. CBD Oil Show Up in Drug Tests? Everything you Need to Know - AOL

    www.aol.com/cbd-oil-show-drug-tests-030000396.html

    In a saliva drug test, CBD is usually detectable for up to four days after use, while a hair drug test has the longest CBD detection window, and it can detect CBD or THC metabolites up to 90 days ...

  5. Hair analysis - Wikipedia

    en.wikipedia.org/wiki/Hair_analysis

    Chemical hair analysis may be considered for retrospective purposes when blood and urine are no longer expected to contain a particular contaminant, typically three months or less. Its most widely accepted use is in the fields of forensic toxicology, in pre-employment drug testing and, increasingly, in environmental toxicology.

  6. Enzyme multiplied immunoassay technique - Wikipedia

    en.wikipedia.org/wiki/Enzyme_multiplied...

    The more drug there is in the sample, the more free enzyme there will be, and the increased enzyme activity causes a change in color. [ 2 ] : 70 Determination of drug levels in serum is particularly important when the difference in the concentrations needed to produce a therapeutic effect and adverse side reactions (the therapeutic window ) is ...

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  8. San Francisco voters approve drug screening for welfare ... - AOL

    www.aol.com/san-francisco-voters-approve-drug...

    San Francisco voters showed strong support for a ballot measure that requires welfare recipients who receive aid from the city and are “reasonably” suspected of using drugs to be screened and ...

  9. Forensic toxicology - Wikipedia

    en.wikipedia.org/wiki/Forensic_toxicology

    Testing for drugs in hair is not standard throughout the population. The darker and coarser the hair the more drug that will be found in the hair. If two people consumed the same amount of drugs, the person with the darker and coarser hair will have more drug in their hair than the lighter haired person when tested.