Laboratory drug screens are performed on urine specimens by enzyme immunoassay (EIA). Drug test confirmations are available by thin layer chromatography (TLC), radioimmunoassay (RIA), gas chromatography (GC), gas chromatography/mass spectrometry (GC/MS) and liquid chromatography/mass spectrometry/mass spectrometry (LC/MS/MS).
Each drug screen and drug test confirmation is performed on state of the art equipment by experienced staff. The analytical methods used for the detection of drugs of abuse are scientifically accepted and approved by the U.S. Department of Health and Human Services. The configurations offered by On-site Screening are listed below along with the screening and confirmation cut-off levels for urine testing.