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o-, m-, p-Xylene (as Methylhippuric Acid), Occupational Exposure, Urine
Evaluate exposure to o-, m-, p-xylene
Gas chromatography/flame ionization detection (GC/FID); spectrophotometry (SPEC)
Urine container should be filled to prevent loss of volatile compound into headspace.
Refrigerate; specimen may also be frozen.
Causes for Rejection
Urine from preservative tube