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Test ID: FXYLP    
Xylene Exposure Panel, Urine

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

Reporting limit determined each analysis


Creatinine (mg/L)

  U.S. Population (10th – 90th percentiles, median)

  All participants:

            335 - 2370 mg/L, median:  1180 (n=22,245)


            495 - 2540 mg/L, median: 1370 (n=10,610)


            273 - 2170 mg/L, median 994 (n=11,635)


Methylhippuric Acid (g/L)

  Synonym(s):  Methylhippurate; Xylene Metabolite


  Exposure to 100 ppm xylene in air for 8 hours,

  produced urine concentrations of approximately 3 g/L.


 Methylhippuric Acid (Creatinine Corrected) (g/g Creat)

  Synonym(s): Methylhippurate; Xylene Metabolite


  Following exposure to Xylene:  

  Biological exposure index (ACGIH):

  1.5 g Methylhippuric Acid/g Creatinine measured in an end

  of shift specimen.


Specific Gravity Confirmation

  Physiologic range:  1.010 - 1.030.


Test Performed by: NMS Labs

                             3701 Welsh Road

                             P.O. Box 433A

                             Willow Grove, PA 19090-0437