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2. Cannabis drug testing - Wikipedia

   en.wikipedia.org/wiki/Cannabis_drug_testing

   To administer the test, a user simply has to mix the chemicals with a particle of the suspected substance; if the chemicals turn purple, this indicates the possibility of marijuana. But the color variations can be subtle, and readings can vary by examiner. It was adopted in the 1950s by the United Nations as the preferred test for cannabis ...

3. 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 ...

4. Home test kits can detect marijuana in cannabis products ...

   www.aol.com/news/home-test-kits-detect-marijuana...

   Does that product contain an illegal level of THC? This will help you find out.

5. Marquis reagent - Wikipedia

   en.wikipedia.org/wiki/Marquis_reagent

   The above photo shows the positive results of the number 2 Marquis reagent presumptive drug test when used with a sample of opium. It is the primary presumptive test used in Ecstasy reagent testing kits. It can also be used to test for such substances as opiates (e.g. codeine, heroin), and phenethylamines (e.g. 2C-B, mescaline).

6. Amazon backs legalizing marijuana, drops testing - AOL

   www.aol.com/news/amazon-backs-legalizing...

   Amazon on Tuesday announced its support for legalizing marijuana in the U.S and said it would drop its weed-testing requirements for some employees.In a blog post, the head of Amazon’s consumer ...

7. Drugwipe test - Wikipedia

   en.wikipedia.org/wiki/Drugwipe_test

   The DrugWipe is a test used to wipe surfaces for traces of drug residue. It may also be used for sweat or saliva testing of individuals. DrugWipe was named a finalist in the 2011 Cygnus Law Enforcement Group Innovation Awards competition. The DrugWipe 6s (saliva only) test was entered under the category of 'Traffic Enforcement'. [1]