How to Conduct Hair Drug Test Procedure
Hair test is a common type of drug test that identifies the presence of illegal drugs. Compare to other drug test, hair tests is more precise, non-offensive and do not require isolated area to gather the specimen.
The Substance Abuse and Mental Health Services Administration of the United States federal government obliged most employers to practiced or screen for five types of drugs known collectively as the SAMHSA-5. These are amphetamines, cocaine, marijuana, opiates and phencyclidine (PCP).
When drugs are taken or consumed, they pass through the bloodstream and are absorbed and digested over time. Drug metabolites leave the body through body fluids and they are also present in the hair. Drug metabolites stay in the hair even as hair follicles develop. A hair test analyzes the cortex, or inner portion of the strands of hair.
The hair sample gathered for ordinary hair tests is removed from as nearest to the scalp as possible. Hair samples are normally an inch and a half long. Fifty to 100 strands of hair are needed to start the screening. If hair from the head cannot be collected, body hair may be used. Hair samples that have formerly dropped from the body can be tested. On the other hand, such samples are not used because there is no acceptable way to determine the age of the sample or from whom it was gathered.
Drug metabolites may happen for five days to reach the hair and shows above the scalp. As a result, hair tests will not expose drug use that happened just before to testing. Hair tests usually screen for drug use that happened within the last three months.
GC/MS for gas chromatography and mass spectrometry is a method of checking the identity of many substances. It is a process normally used to verify the outcome of a drug test. A gas chromatography device turns the sample into vapor and examines its components. Mass spectrometry determines substances by charging the molecules and passing them through a magnetic field that split up molecules by their diverse electrical charges. When “GC” and “MS” are used together they very exactly recognize drug molecules.
Even though hair tests are more costly to administer, they offer a longer period of exposure than blood tests or urinalysis. Hair tests are dependable, precise and difficult to be tampered.
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