Search All

Lab Test Dictionary

Porphyrins, Fractionated, Quantitative and Porphobilinogen, 24 Hour Urine (17198)

Methodology

High Performance Liquid Chromatography (HPLC); Chromatography/Mass Spectrometry

Specimen Type

Urine, Timed Collection

Performing Lab

Quest Diagnostics San Juan Capistrano

Epic ID

LAB01312

Lab Test Days

Sunday, Tuesday, Friday

Standard TAT

5-7 Days

Collection Information

Specimen Required

2-4 mL 24 Hour Urine

Container Type

24-Hour Urine Container

Collection Instructions

Urine for a 24 hour collection should be alkalinized with sodium carbonate to a pH of 6-7. The urine should be refrigerated and protected from light during collection.

Processing Information - Lab Use Only

Transport Temperature

Refrigerate-OK/Frozen-OK

Specimen Stability

Room Temp=Unacceptable; Refrigerated=7 Days; Frozen=30 Days

Rejection Criteria

Received room temperature; Not protected from light; pH<4.0 (acidified urine)

Test Volume Required

4 mL 24 Hour Urine

Minimum Test Volume

2 mL 24 Hour Urine

Processing Instructions

Urine for a 24 hour collection should be alkalinized with sodium carbonate to a pH of 6-7. The urine should be refrigerated and protected from light during collection. Indicate total volume and collection duration in comments and on specimen.

Included Tests

Porphyrins, Fractionated, Quantitative, 24 Hour Urine (Coproporphyrin I, Coproporphyrin III, Heptacarboxyporphyrin, Hexacarboxyporphyrin, Pentacarboxyporphyrin, Total Porphyrins, Uroporphyrin I, Uroporhyrin III) and Porphobilinogen, Quantitative, 24 Hour Urine