Drug testing dating
This second test can also test for specific drugs and can detect as many as 17 different drugs.The GC/MS also guards against false-positive results caused by foods like poppy seeds or hemp seeds.The documents posted on this site are XML renditions of published Federal Register documents.Each document posted on the site includes a link to the corresponding official PDF file on The collector will place the hair in foil and then in a secure envelope to be mailed for overnight testing.A negative result can be determined within 24 hours of hair removal. This test determines if the hair sample is negative for drug use.
Because lab results are confidential health information, you’ll need to sign a release before the results are passed on to your workplace.
During this test, a small amount of hair is removed from your head using scissors.
The sample is then analyzed for signs of drug use during the 90 days preceding the test.
A negative result indicates that you haven’t engaged in illicit drug use over the past 90 days. An inconclusive result isn’t common when testing procedures are followed.
Additional testing is required to confirm a positive result. All nonnegative tests undergo a second test, called gas chromatography/mass spectrometry (GC/MS). In some cases, improper collection of the hair specimen may result in the test being rejected completely. The laboratory responsible for testing will deliver the results to the individual or organization requesting the test.
It’s typically used to test for: While a urine drug screen can detect if you’ve used drugs in the last few days, a hair follicle drug test can detect drug use in the past 90 days.