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Laboratory Test Directory

THC with THC Quant


Name Method Department Units
THC with THC Quant Fluoresence polarization immunoassay / GCMS
Core Lab, Chemistry, Routine ng/mL

Specimen Requirements


Container Type Container Size Specimen Volume

Sterile container

N/A 10 mL

Urine container with temperature strip

N/A 10 mL

Room temperature - 1 day(s)
Refrigerated - 5 day(s)
Frozen - 12 month(s)

Specimen Preparation

  • Seal collection container tightly after collection
  • Transport to laboratory as soon as possible

Reasons for Rejection

  • Bacterial contamination
  • Collected in diaper or cotton balls
  • Diluted specimen
  • pH not within specified limits
  • Contamination
  • Wrong type of specimen


THC screen (cut-off concentration is 50 ng/mL) with quantitated positive. THC-positive samples are sent out to OSU Toxicology, where quantitation is only performed Monday through Friday.

CPT Code

  • 80307
  • 82542