Click here for more information about laboratory operations and procedures
If you have additional questions regarding this test, please call: 415-353-1667
Barbiturates Screen, Urine
|Test Update Information||Effective 01/14/2013, the platform used for the barbiturates immunoassay screen has changed from the Abbot Axsym to the Beckman UniCel DxC 800.|
|Performed by||Parnassus Chemistry|
|In House Availability||Test available 24 hours per day 7 days per week|
|Method||Competitive enzyme immunoassay method (Beckman UniCel DxC800) 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 cutoff concentration of 200 µg/L
|Synonyms||Butisol; Alurate; Amobarbital; Amytal; Apobarbital; Butabarbital; Butalbital; Fiorinal; Gemonil; Metharbital; Secobarbital; Seconal; Tuinal|
|Stability||Refrigerated 1 week, frozen at -20C 2 weeks|
|Turn around times||Stat 2 hours, routine 4 hours|
|Additional information||A concentration of < 200 µg/L is considered negative by this test. A positive result is ≥ 200 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 a number of barbiturates at varying concentrations.
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. Samples are held for 7 days. Contact laboratory at x 31667 to request confirmatory testing. Confirmatory test code BARC. False negative results are also possible.
Barbiturates can be detected in urine from 1 up to 14 days after use (especially for phenobarbital as it is long-acting).
|Last Updated||3/24/2013 7:38:04 PM|
|Lab Procedure Link||Click here for Procedure|