Urine drug tests are commonly performed to detect a drug user through his urine. It is done routinely to checks for drugs or their byproducts in the urine. There are many purposes of these tests including drug detoxification programs, school and employment screening, athletic screening and emergency room settings. This test detects the commonly used drugs such as: cocaine, marijuana, barbiturates, amphetamines, phencyclidine, metamphetamines, benzodiazepines and opiates. Urine drug test has been suggested and in many cases implemented for prospective and current employees in industry, for personnel of the armed forces, for parolees and bail seekers in civilian court systems, for workers in the transportation industry and for individuals who serve as role models, such as nationally known athletes.
A false positive occurs when the test results come back positive for drugs, but no drugs have been taken. If your first test does come back positive, but you are not into drug abuse, you will be given a second type of tests which is the confirmatory test. Confirmatory urine drug test is usually done through the use of gas Chromatography and mass spectrometry which are simply dubbed as GC/MS. This may also be through HPLC or (high-performance liquid chromatography). The test results are known to be highly specific and are typically used to single out a specific drug during the test. Due to these, GC/MS are usually more expensive than the other and may take longer, but the results are definitely accurate.
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