Click here for more information about laboratory operations and procedures
If you have additional questions regarding this test, please call: 415-353-1667
Amphetamine Screen, Urine
|Performed by||Parnassus & Mission Bay Chemistry|
|In House Availability||Test available 24 hours per day 7 days per week|
|Method||Competitive enzyme immunoassay method (Beckman UniCel DxC 800 analyzer) using G6PDH-labeling|
|Container type||Urine cup|
|Amount to Collect||See preferred volume|
|Sample type||Random urine|
|Preferred volume||1 mL urine|
|Min. Volume||0.5 mL urine|
Note: a negative result indicates that this class of drugs is not present, or they are present at a concentration below the cut-off concentration of 1000 µg/L
|Stability||Refrigerated 1 week, frozen at -20C 2 weeks|
|Turn around times||STAT 2 hours, Routine 4 hours|
A concentration of < 1000 µg/L is considered negative by this test. A positive result is ≥ 1000 µg/L and indicates the presence of this class of drugs. This immunoassay is only a screening test and is not definitive. Results cannot be used for medico-legal purposes.
This assay detects amphetamine and methamphetamine and has some cross reactivity with MDA (methylenedioxyamphetamine) and MDMA (methylenedioxymethamphetamine; ecstasy).
Click here for List of Cross Reactive Substances
False positive results may occur due to other cross reacting substances, however, positive results are NOT routinely confirmed by a second method. If confirmation of the test result is required, it is the responsibility of the physician to separately order a specific confirmatory test for the drug identified. Contact laboratory at x 31667 to request confirmatory testing. Confirmation test code AMPC. Samples are held for 7 days. False negative results are also possible, for example, with use of newer designer amine compounds.
Amphetamine can be detected in urine from 24 hours up to 9 days after use. Methamphetamine can typically be detected 1.5-6 days after use. (From: Verstraete AG. Detection Times of Drugs of Abuse in Blood, Urine and Oral Fluid. Ther Drug Monit, 26(2) April 2004, 200-205).
|Last Updated||5/28/2016 6:01:31 PM|
|Lab Procedure Link||Click here for Procedure|