Barbiturate Confirmation, Urine

CPT: 80345
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Test Details

Test Includes

Amobarbital; butalbital; pentobarbital (Nembutal®); phenobarbital (Luminal®); secobarbital


Confirm the presence of barbiturates


Mass spectrometry (MS)

Reference Interval

Detectability: 200 ng/mL

Specimen Requirements




20 mL

Minimum Volume

7 mL


Use plastic urine drug bottle and tamper-evident seal for forensic specimen. Collection kits are available by request from the laboratory.


Urine temperature monitoring is recommended for samples to be tested for medicolegal purposes.

Storage Instructions

Maintain specimen at room temperature. If arrival extends beyond seven days, then refrigerate.

Causes for Rejection

Quantity not sufficient for analysis; improper specimen (serum, plasma, blood); incomplete chain-of-custody documentation; incomplete specimen identification; improper or missing tamper-evident seals

Clinical Information

Special Instructions

Chain-of-custody documentation is required for samples submitted for preëmployment, random employee testing, and forensic purposes. For other applications, use the standard test request form. Please mark chain-of-custody test number on the test request form.


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
071290 Barbiturate Confirmation, Ur 777012 Barbiturates 3377-9
071290 Barbiturate Confirmation, Ur 777010 Amobarbital 3339-9
071290 Barbiturate Confirmation, Ur 071696 Amobarbital GC/MS Conf ng/mL 16239-6
071290 Barbiturate Confirmation, Ur 777013 Secobarbital 4029-5
071290 Barbiturate Confirmation, Ur 714485 Secobarbital GC/MS Conf ng/mL 16238-8
071290 Barbiturate Confirmation, Ur 777014 Butalbital 3421-5
071290 Barbiturate Confirmation, Ur 714501 Butalbital GC/MS Conf ng/mL 16237-0
071290 Barbiturate Confirmation, Ur 777015 Pentobarbital 3925-5
071290 Barbiturate Confirmation, Ur 714543 Pentobarbital GC/MS Conf ng/mL 16240-4
071290 Barbiturate Confirmation, Ur 777016 Phenobarbital 3949-5
071290 Barbiturate Confirmation, Ur 714568 Phenobarbital GC/MS Conf ng/mL 16241-2

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