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  2. Cannabis drug testing - Wikipedia

    en.wikipedia.org/wiki/Cannabis_drug_testing

    The main metabolite excreted in the urine is 11-Nor-9-carboxy-THC, also known as THC-COOH. Most cannabis drug tests yield a positive result when the concentration of THC-COOH in urine exceeds 50 ng/mL. [10] Urine testing is an immunoassay based test on the principle of competitive binding. Drugs which may be present in the urine specimen ...

  3. Cannabis and impaired driving - Wikipedia

    en.wikipedia.org/wiki/Cannabis_and_impaired_driving

    [40] [41] 49 CFR Part 199 and 49 CFR Part 40 set maximum urine concentration levels of THC-A as the threshold for impairment for regulated transportation occupations. [41] As of January 1, 2018, the THC-A testing cutoffs were 50 ng/mL for an initial immunoassay test and 15 ng/mL for a confirmatory gas chromatography–mass spectrometry test. [42]

  4. Enzyme multiplied immunoassay technique - Wikipedia

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

    Enzyme multiplied immunoassay technique (EMIT) is a common method for qualitative and quantitative determination of therapeutic and recreational drugs and certain proteins in serum and urine. [ 1 ] It is an immunoassay in which a drug or metabolite in the sample competes with a drug/metabolite labelled with an enzyme, to bind to an antibody.

  5. Unlike alcohol, THC impairment is hard to measure — making a ...

    www.aol.com/news/arbitrary-cutoffs-thc-levels...

    One issue is that alcohol is water soluble whereas THC is fat soluble, so using the same type of test for both substances is the best tool law enforcement has at the moment, but may not be ...

  6. Duquenois–Levine reagent - Wikipedia

    en.wikipedia.org/wiki/Duquenois–Levine_reagent

    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 ...

  7. Drugwipe test - Wikipedia

    en.wikipedia.org/wiki/Drugwipe_test

    Securetec cannabis and methamphetamine. A number of independent studies examine the efficacy of the DrugWipe, particularly for its lack of sensitivity for detecting Cannabis (delta-9-thc) which the Australian National Health Survey 2009 [3] listed as the most frequently used illicit drug at 10.4% with 36% smoking at least once a week or more in 2016.

  8. Drug test - Wikipedia

    en.wikipedia.org/wiki/Drug_test

    Urine drug testing is one of the most common testing methods used. The enzyme-multiplied immune test is the most frequently used urinalysis. Complaints have been made about the relatively high rates of false positives using this test. [18] Urine drug tests screen the urine for the presence of a parent drug or its metabolites.

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