jsims179
Jan 11, 2012, 07:08 PM
What is the cut off levels for probation officers drug tests is it the normal loke everyone 50 ng/ml for marijuana
DrBill100
Jan 11, 2012, 07:23 PM
It is probably more related to laboratory practice. Standard cutoff is 50 ng (forensic) although some labs offer 25 ng. Usually, the cutoff is 50 (IA) screen and 15 at confirmation (GC/MS>)*. These figures relate to urine testing.
*confirmation testing is performed only after a positive IA.