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Test Code PHOS-RU Phosphorus, Urine Random

Synonyms/Keywords

PO4-RU

Specimen Requirements

Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No Urine Sage Cup Urine Container   2 mL 0.5 mL  

Collection/Processing Instructions

Specimens collected with 0.5 g sulfamic acid or 6N HCl are preferred.  If locally collected, random urine specimen, no preservative is also acceptable.

 

The specimen should be pH 5.0 or less for analysis, unless the specimen volume is <2mL.

 

If uric acid is also ordered, no preservative is needed but maintain specimen refrigerated during transport to the receiving facility. 

 

Receiving facility must prepare two 10 mL aliquots, adjusting pH of phosphorus aliquot to 5 or less using 6N hydrochloric acid (also appropriate for calcium, magnesium, oxalate, and citrate) and the pH of a second (uric acid) aliquot to 7.5-8.5 using 20% sodium hydroxide. 

 

Alternatively, use Marshfield preservative-containing aliquot tubes which provide automatic pH adjustment.
 

Specimen Stability Information

Specimen Type Temperature Time
Urine - No Preservative Ambient 2 hours
Refrigerate 4 days
Urine - With Preservative Refrigerate 7 days

Reference Range Information

Performing Location Reference Range
Marshfield Not established

Marshfield Labs Performing Department

Marshfield Labs Chemistry

Performing Information

Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield Monday through Sunday Less than 2 hours Phosphomolybdate Complex Endpoint Assay/ Beckman AU

CPT Codes

CPT Modifier
(if needed)		 Quantity Description Comments
84105        

Outreach CPT Codes

CPT Modifier
(if needed)		 Quantity Description Comments
84105        

Ordering Applications

Ordering Application Description
Cerner Phosphorus Level Urine