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22777 Phosphorus, Urine 24 Hour

Phosphorus, Urine 24 Hour
Test Code: PH-24H
Synonyms/Keywords
Phosphorus - Urine, 24hr​
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​
24H Urine Jug
Urine Container with 7 g. sulfamic acid.​
 ​ 10 mL aliquot​ 1 mL aliquot​ ​
Collection Processing Instructions
10 mL aliquot from a well-mixed 24 hour urine collected with 7 g. sulfamic acid.  Indicate the collection time.  The total volume collected must be measured, recorded, and included with the test request.
When only Phosphorus is requested, an acceptable alternative preservative is 20 mL 6N hydrochloric acid. 
If uric acid is also ordered, no preservative is needed but maintain specimen refrigerated during patient collection as well as 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
Rejection Criteria
Specimens without preservation during collection (refrigeration or acid preservative) are unacceptable.
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday​8 hours​ Phosphomolybdate Complex Endpoint Assay/Beckman AU
Reference Range Information
Performing Location Reference Range
Marshfield​ 0.38 - 1.13 g/24 hr
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
84105  ​ ​ ​ ​ ​
Synonyms/Keywords
Phosphorus - Urine, 24hr​
Ordering Applications
Ordering Application Description
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
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​
24H Urine Jug
Urine Container with 7 g. sulfamic acid.​
 ​ 10 mL aliquot​ 1 mL aliquot​ ​
Collection Processing
10 mL aliquot from a well-mixed 24 hour urine collected with 7 g. sulfamic acid.  Indicate the collection time.  The total volume collected must be measured, recorded, and included with the test request.
When only Phosphorus is requested, an acceptable alternative preservative is 20 mL 6N hydrochloric acid. 
If uric acid is also ordered, no preservative is needed but maintain specimen refrigerated during patient collection as well as 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
Rejection Criteria
Specimens without preservation during collection (refrigeration or acid preservative) are unacceptable.
Reference Range Information
Performing Location Reference Range
Marshfield​ 0.38 - 1.13 g/24 hr
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday​8 hours​ Phosphomolybdate Complex Endpoint Assay/Beckman AU
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
84105  ​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.