Hair Drug Testing
Hair Drug TestingFor the first time hair was tested by Psychemedics Corporation. Let’s touch upon this method in brief. Drug metabolites are circulated in the blood, enter the scalp's blood vessels and are filtered through the hair. These metabolites remain in the hair. Specialists take about 50 strands of hair and dissolve in a series of solvents. Then the liquified sample is analyzed by specialists with the help of Gas Chromatography and Mass Spectometry. That’s why hair testing is a highly sensitive test. However, it is rather expensive yet and has prolonged process. And as a result, it means that it isn't often used. Moreover, it also requires a confirmation drug test using urine.
Hair Drug Screen Detection Period