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Test Code NBLD0407 Barbiturate Screen, Urine

Useful For

Qualitative screening for drugs of abuse


Enzyme-Multiplied Immunoassay Technique (EMIT)

Performing Laboratory

Bozeman Health Laboratory Services

Specimen Requirements

Specimen Type: Urine

Container/Tube: Clean container

Specimen Volume: 25 mL

Specimen Minimum Volume: 3 mL

Collection Instructions:

1. Collect a freshly-voided, random urine collection.

2. No preservative.

3. Refrigerate specimen after collection, and send specimen refrigerated.

4. If there is a delay in transport of >24 hours, freeze specimen in plastic container.

Specimen Transport Temperature

Refrigerated <24 hours/Frozen >24 hours

Specimen Stability


Specimen Type Temperature Time
Urine Refrigerated 24 hours
  Frozen 14 days


Reference Values

Negative (reported as positive or negative)


Cutoff concentration: 200 ng/mL (0.2 µg/mL)

The results from this test can be reported qualitatively as negative or positive relative to the 200 ng/mL cutoff level for barbiturates. Positive results indicate that the specimen is likely to contain barbiturates. Negative results indicate that either the specimen does not contain barbiturates or that barbiturates are present in concentrations below the cutoff level of 200 ng/mL.
Results of this test should always be interpreted in conjunction with the patient’s medical history, clinical presentation, and other findings.

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding