Drug & Alcohol Testing - Urine Testing
Urine Testing
Medvet Laboratories conducts urine testing as per the Australian Standard AS/NZS4308:2001. The Australian Standards for urine details types of drugs to be tested and the cut-off levels for these drugs in urine. Drug screening has been set up as a "two-tier" testing procedure. This means that there are two completely independent tests (each with independent set of cut-off levels). For a sample to be reported as positive it MUST test above the cut-off level on BOTH tests.
The first test is a screening test (immunoassay) and it is used to rapidly eliminate the clearly negative samples, and to flag other samples for further laboratory investigation. This screening test is providing information on the presence or absence of drug groups in the sample being tested. It can be performed on-site or specimens dispatched to the laboratory. If no drug groups are found, the sample is negative. If a drug group is detected above the set cut-off level of the Standard the sample is considered a presumptive positive result and is investigated further by GCMS.
The GCMS testing determines the exact drug present and therefore easily distinguishes between prescription and illicit drugs. Again, the level must be above the set cut-off levels to be reported as a positive result. The two tier testing system is in place to ensure that the accuracy of results and to provide a cost-effective means of eliminating many samples rapidly and concentrating further investigation on a small percentage.
