Test Code BARBU Barbiturates Confirmation, Random, Urine
Reporting Name
Barbiturates Confirmation, UUseful For
Detecting drug abuse involving barbiturates such as amobarbital, butalbital, pentobarbital, phenobarbital, and secobarbital
Performing Laboratory

Specimen Type
UrineOrdering Guidance
1. For situations where chain of custody is required, a Chain-of-Custody Kit (T282) is available. For chain-of-custody testing, order BARBX / Barbiturates Confirmation, Chain of Custody, Random, Urine.
2. Additional drug panels and specific requests are available. Call 800-533-1710 or 507-266-5700.
3. If urine creatinine is required or adulteration of the sample is suspected, order ADULT / Adulterants Survey, Random, Urine.
Specimen Required
Supplies: Urine Tubes, 10 mL (T068)
Container/Tube: Plastic, 10-mL urine tube
Specimen Volume: 10 mL
Collection Instructions:
1. Collect a random urine specimen.
2. No preservative.
Additional Information:
1. No specimen substitutions.
2. STATS are not accepted for this test.
Specimen Minimum Volume
5 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Urine | Refrigerated (preferred) | 14 days | |
Frozen | 14 days | ||
Ambient | 72 hours |
Reference Values
Negative
Cutoff concentrations:
BUTALBITAL BY GC-MS
<100 ng/mL
AMOBARBITAL BY GC-MS
<100 ng/mL
PENTOBARBITAL BY GC-MS
<100 ng/mL
SECOBARBITAL BY GC-MS
<100 ng/mL
PHENOBARBITAL BY GC-MS
<100 ng/mL
Day(s) Performed
Tuesday, Thursday, Sunday
Test Classification
This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
80345
G0480 (if appropriate)
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
BARBU | Barbiturates Confirmation, U | 53746-4 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
21442 | Butalbital-by GC/MS | 16237-0 |
20642 | Amobarbital-by GC/MS | 16239-6 |
20643 | Pentobarbital-by GC/MS | 16240-4 |
20644 | Secobarbital-by GC/MS | 16238-8 |
20645 | Phenobarbital-by GC/MS | 16241-2 |
20651 | Barbiturates Interpretation | 69050-3 |
20647 | Chain of Custody | 77202-0 |
Report Available
3 to 5 daysReject Due To
Gross hemolysis | OK |
Gross icterus | OK |
Method Name
Gas Chromatography-Mass Spectrometry (GC-MS) Confirmation with Quantitation
Secondary ID
80372Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.