cutoff

Is an 50 ng/ml cutoff on an immunoassay test is equivalent to a 15-20 ng/ml cutoff on a GC/MS. Since Ng/Ml tests for 31 metabolites and GC/MS tests for 1 specific metabolites ?

I was heavily smoking for about a month maybe a little longer. I was smoking high thc marijuana multiple times a day every day 3-4 times a day for that time period, I probably went through an oz a month for 2-3 months.. I need to pass a drug test in the next couple days. I have abstained from...