The CDIATM Marijuana Colloidal Gold Test Cassette (Urine) is a lateral flow chromatographic immunoassay for the detection of marijuana and its metabolites in human urine.
THC antigen is coated on the test region of the nitrocellulose membrane of the strips, and THC antibody is labeled with colloid gold. During a test, the colloid gold labeled antibody coated in the strip move forward along the membrane, and a red line will show up when the antibody gathers with the antigen in the test line; if THC in the sample is over the detection limit, line T is blank; on the other wise, if THC in the sample is less than the detection limit, line T is red.
THC (∆9-tetrahydrocannabinol) is the primary active ingredient in cannabis (marijuana). THC is central nervous stimulant that alters mood and sensory perceptions, produces loss of coordination, impairs short-term memory, produces symptoms of anxiety, paranoia, depression, confusion, hallucination, and increases heart rate. Large doses of marijuana could develop tolerances and physiological dependency and lead its abuse. The main metabolite excreted in the urine is 11-nor-∆9-tetrahydrocannabinol-9-carboxylic acid (∆9–THC-COOH), which is found in the urine within hours of exposure and remains detectable for 3-10 days after smoking. The CDIATM Marijuana Colloidal Gold Test Cassette (Urine) is a rapid urine-screening test that can be performed without the use of an instrument. The test utilizes a monoclonal antibody to selectively detect elevated levels of THC in urine. The CDIATM Marijuana Colloidal Gold Test Cassette (Urine) yields a positive result when the THC in urine exceeds 200/150/50/20/15 ng/mL.