PORPHYRINS, FRACTIONATION/QUANTITATION, URINE
Collect 24 hour urine. Refrigerate and protect from light during collection. Mix well and send 2.0 mL minimum of urine in an amber screw-capped plastic vial.
Protect from light–Record 24 hour urine volume on test requisition and specimen label.
Room Temperature Unacceptable, Refrigerated 4 days, Frozen 1 month
5-7 days Performed Mon-Fri
Evaluate porphyrias, including those involving deficiencies of enzymes which are needed for heme synthesis and chemical porphyrias.