Labcorp Standard Gcms Confirmation Cut Off Levelforum Create Topic - Standard lab cut off is 50 ng/ml unless ordered otherwise. The cut off for marijuana on the screen is 50 ng/ml, which is a composite of all 31 metabolite concentrations. If the sample is below this level the test is over as a passing status. Department of health and human services (hhs). When performing confirmation testing by gc/ms or lc/ms/ms, one or more specific metabolites can be identified, quantified and reported using the applicable confirmation cutoff for a positive. If the lab said it was 20/15 then itโs that way. But if this is a test you did on. When performing confirmation testing by gc/ms or lc/ms/ms, one or more specific metabolites can be identified, quantified and reported using the applicable confirmation cutoff for a positive. The key effect of nitrites is, when present, they will interfere with the gc/ms confirmation of a cannabinoid positive. In vivo by ingestion of materials that would change the urinary ph.
Standard lab cut off is 50 ng/ml unless ordered otherwise. The cut off for marijuana on the screen is 50 ng/ml, which is a composite of all 31 metabolite concentrations. If the sample is below this level the test is over as a passing status. Department of health and human services (hhs). When performing confirmation testing by gc/ms or lc/ms/ms, one or more specific metabolites can be identified, quantified and reported using the applicable confirmation cutoff for a positive.
