Quote Originally Posted by Foggy22
So all GC/MS testing should prove to be over 50ng ml given the the sample even qualified for conformation testing?
The GC/MS carries a cutoff threshold of 15 ng and is used for the confirmation test only. It would be way too costly for both the lab and client for the GC/MS to be used as the primary methodology. Thats why theres an initial Immunoassay screen.