Styrene Exposure Profile, Urine Test (4213U)

Styrene Exposure Profile, Urine Test (4213U)

Analysis Code 4213U 
Test Name Styrene Exposure Profile, Urine 
Test Includes Creatinine; Mandelic Acid; Mandelic Acid (Creatinine corrected); Mandelic Acid Plus Phenylglyoxylic Acid (Creatinine corrected); Phenylglyoxylic Acid; Phenylglyoxylic Acid (Creatinine corrected) 
Compound Synonym(s) Benzoylformic acid; Mandelate; Organic Acids; Phenylglyoxylate; Styrene and Ethylbenzene Metabolite; Vinylbenzene Metabolite; alpha-Hydroxyphenylacetic acid 
Purpose Occupational Exposure Monitoring; This test is New York State approved. 
Category Biological Marker (Renal), Aromatic Solvents Metabolites 
Method(s) Colorimetry (C)
High Performance Liquid Chromatography/
TandemMass Spectrometry (LC-MS/MS) 
Specimen Requirements 3 mL Urine 
Transport Temperature Refrigerated 
Specimen Container Plastic container (preservative-free) 
Special Handling Collect sample at end of shift.
Acidify with 1.0 mL acetic acid per 100 mL urine. 
Light Protection Required Not Required 
Stability Room Temperature: 5 day(s)
Refrigerated: 30 day(s)
Frozen (-20 °C): 1 month(s) 
*Rejection Criteria Received Room Temperature. 
Day(s) Test Set-up / TAT [Colorimetry] Friday / 1 day
[LC-MS/MS] Thursday / 3 days 
Suggested CPT Code 82570
83921 
**Minimum Volume 1.1 mL 
Reflex Testing
(when required, addl' fee may apply)
6022U - Specific Gravity Confirmation, Urine 
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You are viewing Styrene Exposure Profile, Urine Test (4213U)
*Rejection criteria pertain to clinical specimen submissions only.
**Stated minimum volume allows for a single analysis. Repeat analysis will not be performed.


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