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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
24-hour urine, collection should be adjusted to a pH of 6-7 with 5 g sodium carbonate (Na2CO3). Add the sodium carbonate at the start of the collection. The urine should be refrigerated and protected from light during collection. Give specimen to Chemistry to measure total volume and Hematology to adjust pH with sodium carbonate (Na2CO3) stored in Hematology hood and supplied by Quest.
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
24-hour urine, collection should be adjusted to a pH of 6-7 with 5 g sodium carbonate (Na2CO3). Add the sodium carbonate at the start of the collection. The urine should be refrigerated and protected from light during collection. Give specimen to Chemistry to measure total volume and Hematology to adjust pH with sodium carbonate (Na2CO3) stored in Hematology hood and supplied by Quest. 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.
CPT Codes
84120, 84110
Revised
5/17/24
Initials
SA