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HelpTest Code BARBU Barbiturates Confirmation, Random, Urine
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
UrineOrdering Guidance
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.
Additional drug panels and specific requests are available. Call 800-533-1710 or 507-266-5700.
Additional Testing Requirements
If urine creatinine is required or adulteration of the sample is suspected, also order ADULT / Adulterants Survey, Random, Urine in addition to this test.
Specimen Required
Supplies: Urine Tubes, 10 mL (T068)
Collection Container/Tube: Plastic urine container
Submission 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. STAT requests are not accepted for this test.
Specimen Minimum Volume
5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 14 days |
| Frozen | 14 days | |
| Ambient | 72 hours |
Reference Values
Negative (Positive results are reported with a quantitative result)
Cutoff concentrations by gas chromatography mass spectrometry:
Butalbital: 100 ng/mL
Amobarbital: 100 ng/mL
Pentobarbital: 100 ng/mL
Secobarbital: 100 ng/mL
Phenobarbital: 100 ng/mL
Day(s) Performed
Monday, Wednesday, Friday
CPT Code Information
G0480
80345 (if appropriate for select payers)
Report Available
3 to 5 daysReject Due To
| Gross hemolysis | OK |
| Gross icterus | OK |