Marijuana Detection Tests

marijuana detection tests

There are different ways of how you can ingest marijuana and there also a lot of ways of detecting it in your body. Some said that the active ingredient of marijuana can still be traced in the body even after a month of last having it using certain tests but that would also depend on the frequency and amount of cannabis you have been taking.

The following are the marijuana detection tests:

Urine Test

For those who seldom have weed, marijuana can be detected through your urine for up to two to five days. For heavy users, however, it can still be detected for until fifteen days and up to a month for those who have been using marijuana for a long time and those who have more fat stores in the body.

There were talks that taking dietary zinc supplement can hide the presence of THC in a urine test, although a recent study done at the University Of Utah School Of Medicine refuted that idea. However there are substances, the so-called “adulterants”, which when mixed with your urine can give you a false negative result. These adulterants include bleach, nitrates ad visine, though these substances are also tested from the urine specimen that you gave because these are easy to identify.

If you are about to have a urine testing for marijuana, avoid these drugs since they can give a false positive result Dronabinol, Ketoprofen, Naproxen, Ibuprofen,  Piroxicam, Promethazine, Proton pump inhibitors , Efavirenz.

Hair Test

In this test, the most recent 1.5 inches of growth is taken for testing and this gives a detection period of up to three months or ninety days. If the hair length is shorter than 1.5 inches, this also provides a shorter detection period. This tests for the parent metabolite from inside the hair shaft.

Blood Testing

This test is rarely used because it is invasive and can get difficult to be administered. Marijuana can be detected in the blood for about two to three days after the last use. For heavy and chronic user, it can be detected for up to two weeks. This test is usually used when investigating and injury or an accident.

EMIT or Enzyme Multiplied Immunoassay Technique

This may be the most common and cheapest drug test. This is usually used as a preliminary drug test because of the high possibility of having an incorrect result from this screening test. Just abstain from marijuana use for a few days and you won’t have trouble passing this test.

GCMS or Gas Chromatography Mass Spectrometry

This is used as a confirmatory test. Those who had a positive result from their EMIT test are required to take this screening test to eliminate the possibility of a false positive result. Frequent users may have trouble passing this test because marijuana can still be detected in your system even after two to three weeks of having you last marijuana joint.

Duquenois–Levine reagent

This test is the one used in the field. This is a chemical color reaction test. If the chemical color turns purple, then that indicates a positive result. However, this can’t really be accurate because the variation of color can be subtle and the reading of results can depend on the examiner.

So there you go, the marijuana detection tests so should know about. If you are scheduled to take any of these marijuana detection tests, better think twice before you light up that joint. After all, nobody likes failing a test!

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