What is a cut-off level??
As per AS/NZ 4308:2008 - Urine Screening
The two tables below demonstrate the cut-off levels for immunoassay screening (table 1) and laboratory confirmations (table 2) urine
- Cut-off levels are a measurement by which a drug test is deemed to be either negative or non-negative
- Cut-off levels vary for each individual drug class and are determined by the AS/NZ 4308:2008 Drug Testing Standards
- Traces of a drug or its metabolite may be found in urine, but must exceed a pre-determined amount to be deemed non-negative.
- In New Zealand the AS/NZ 4308:2008 Standard dictates the cut-off levels for both immunoassay (on-site) screening and laboratory confirmations
The AS/NZ 4308:2008
Immunoassay screen cut-off levels are :
type substances 300ng/ml
Laboratory cut- off levels for confirmations are
as per AS/NZ 4308:2008 Standard
COMPOUND GC/MS (Confirmation)
Ecgonine methyl ester 150ng/ml
*These drugs may be optionally tested within each
class and the specified cut-off levels shall apply