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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. How long does marijuana stay in the system? It depends on ...

    www.aol.com/long-does-marijuana-stay-system...

    The 4/20 holiday is this weekend, and if you choose to celebrate, please do so safely. But also, be wary of coming drug tests.

  4. 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 ...

  5. 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. The ...

  6. How long does marijuana stay in our systems? Here's why ... - AOL

    www.aol.com/article/2016/02/19/how-long-does...

    A marijuana high lasts only a few hours, but traces of tetrahydrocannabinol, or THC, remain in the body for much longer than that. A marijuana high lasts only a few hours, but traces of ...

  7. NJ legal weed: Find your nearest dispensary for recreational, medical marijuana. If drivers test positive to 3 nanograms or more of THC — the cannabis component that gets people high — they ...

  8. Drug test - Wikipedia

    en.wikipedia.org/wiki/Drug_test

    A drug test (also often toxicology screen or tox screen) is a technical analysis of a biological specimen, for example urine, hair, blood, breath, sweat, or oral fluid/saliva—to determine the presence or absence of specified parent drugs or their metabolites.

  9. Marijuana users found to have lead and another heavy metal in ...

    www.aol.com/news/marijuana-users-found-lead...

    Marijuana users may have elevated levels of lead and cadmium in their blood and urine, a study shows. The heavy metals are linked to long-term health issues.