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HelpTest Code LAB6507 Phosphate, Urine, 24 Hour
Methodology
Colorimetric (Molybdate UV)
Specimen Requirements
Specimen Type: 24 Hour Urine
Container/Tube: Plain, brown urine container with no preservative.
Specimen Volume: Entire collection
Collection Instructions: No additive. Refrigerate specimen during collection.
Additional Information:
1. Starting and ending times of collection are required.
2. See Urine Collection information under General Information.
3. Brown container with green label (6N HCl) is acceptable.
Day(s) Test Set Up
Monday through Sunday
Turnaround Time:
Same day; 2 hours from receipt in lab
Test Classification and CPT Coding
81050-Volume measurement for timed collection
84105-Phosphate, Urine
Reference Values
< 16 years: No reference range established
16 years and up: 400-1300 mg/24 Hours
Additional Information
For BJH Laboratory Use Only:
Collection must be kept refrigerated during the collection and before delivery to limit bacterial growth.
Laboratory Processing Instructions:
Test performed at St. Louis Children's Hospital Core Lab.
Mix urine well. Record volume, period, and pH on request form. Using 13x100 test tubes prepare two 7-mL aliquots. Send one aliquot tube to SLCH for testing. Save one aliquot tube in storage rack. Specimen is stored refrigerated for 5 days.
Special Instructions
See Urine Collection information under General Information.
See Analyte Stability Chart under General Information for a complete list.
LOINC Code Information
| Name | LOINC Code |
| Phosphate in 24 hour urine | 2779-7 |
| Collection duration | 13362-9 |
| Volume of urine | 19153-6 |
Performing Lab
St. Louis Children's Hospital Core Lab