Sorted By Test Name - Mayo Medical Laboratories

FPHEN
91136
FBEN
90294
BENZU
80370
500 Chipeta Way
Salt Lake City, UT 84108
Benzene as Phenol, Occupational Exposure, Urine
Reference Values:
Creatinine: >50 mg/dL
Normal (unexposed population):
less than 10 mg/L
Exposed:
Biological Exposure Index (BEI): 50 mg/g creatinine
(End of Shift)
Toxic:
Not Established
Test Performed By: Medtox Laboratories, Inc.
402 W. County Road D
St. Paul, MN 55112
Benzene, Occupational Exposure, Blood
Reference Values:
Reporting Limit: 0.02 mg/L
Normal (unexposed population):
None detected
Exposed (end-of-shift):
Blood benzene concentrations of >0.1 mg/L correlate
with exposure to >10 ppm benzene in air.
Toxic:
Blood benzene concentrations >0.90 mg/L have been
observed in fatal cases of benzene exposure.
Test Performed By: Medtox Laboratories
402 W. County Road D
St. Paul, MN 55112
Benzodiazepine Confirmation, Urine
Clinical Information: Benzodiazepines are any of a group of compounds having a common
molecular structure and acting similarly as depressants of the central nervous system. As a class of drugs,
benzodiazepines are among the most commonly prescribed drugs in the western hemisphere because of
their efficacy, safety, low addiction potential, minimal side effects, and high public demand for sedative
and anxiolytic agents.
Useful For: Detecting drug use involving benzodiazepines such as alprazolam, flunitrazepam,
chlordiazepoxide, diazepam, flurazepam, lorazepam, and triazolam
Interpretation: Benzodiazepines are extensively metabolized, and the parent compounds are not
detected in urine. This test screens for (and confirms) the presence of: -Nordiazepam, oxazepam
(metabolites of chlordiazepoxide) -Nordiazepam, oxazepam and temazepam (metabolites of diazepam)
Current as of January 4, 2013 7:15 pm CST 800-533-1710 or 507-266-5700 or MayoMedicalLaboratories.com Page 240