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Test Code PHOS U QNT Phosphorus, 24 Hour Urine

Clinical System Name

Urine Phosphorus Quantitation, 24 Hour

Sample Requirements

Specimen: Urine

Container(s): 24 Hour Urine Container

Preferred Vol: Entire volume from 24 hr collection.

Minimum Vol: N/A


Note:  Please contact lab to obtain container (no preservatives are needed) - go to Clinical Lab with patient label to obtain urine container.  Refrigerate sample during collection period.  Document start and stop dates/times, along with patient information.  Deliver labeled container to Clinical Lab upon completion.


Processing Instructions

Reject due to:



Temp: 2 - 8 C

Storage location: CPA refrigerator. Labels are stored in CPA refrigerator, FrigB bucket.


Off-site collection:  Send original container refrigerated.


Specimen Type Temperature Time
  Room temp 7 d
  Refrigerated 14 d
  Frozen 14 d



STAT Performed TAT
N M - F 1 - 3 d


Performing Laboratory

Seattle Children's Laboratory    


Department:  Chemistry

Location: Chem East

Phone Number: (206) 987-2617

Reference Range

100 - 600 mg/ 24 h


Results vary with dietary intake.  Reference range is for quantitative (24 hour) collection; qualitative reference values are not available.


Method: Spectrophotometry by Vitros 4600

Analytical Volume: 0.5 mL

Limitations: Method is affected by fecal contamination, loss of specimen during collection, Loss of 10% of total urine collected invalidates the test.

CPT Codes