Sunquest Code:PHOS  
Epic Code:LAB113Epic Name:Phosphorus
Synonyms:PO4; Phosphate
Methodology:Bichromatic endpoint
St. Johns/St Joseph/Woodwinds: Phosphomolybdate UV
Turnaround Time:Performed and reported 24 hours/day.

Collection Instructions

Optimal Volume:2.5 mL
Minimum\Peds Volume:0.6 mL
Container:Green (lithium heparin, gel), St Johns/St Joseph/Woodwinds-Green (lithium heparin, no gel)
[Alternate Containers: Red (no gel), Red or gold (gel), St Johns/St Joseph/Woodwinds - Red (no gel)]
Causes for Rejection:Hemolysis

Processing and Shipping

Specimen Processing:Centrifuge and aliquot 1.25 mL, 0.1 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:Serum/plasma should be separated from the cells within 2 hours to avoid falsely high PO4. Hemolyzed specimens are unacceptable unless analyzed immediately. Stability: Refrigerated - 7 days; frozen - 6 months.
Test Performed at or Referral Lab Chemistry  (M Health Maple Grove Clinic, Range, UMMC-East Bank, Oxboro Bloom, Lakes, Ridges, Northland, Southdale, UMMC/UMMCH-West Bank, M Health Clinic and Surgery Center, Grand Itasca, St. Joseph's, St. John's, Woodwinds)


Critical Range:Grand Itasca: Less than 1.0 mg/dLor greater than 10.0 mg/dL
All other sites: Less than 1.0 mg/dL
Reference Range:
St Johns/St Joseph/Woodwinds:
Age mg/dL
0-5 y 2.9-6.8
6-10 y 3.1-6.3
11-15 y 2.5-6.0
16 y & older 2.5-4.5
Grand Itasca (all ages): 2.5-5.0 mg/dL

All other sites:
Age mg/dL
0-4 days 4.6-8.0
5 d - 3 y 3.9-6.5
4-11 y 3.7-5.6
12-15 y 2.9-5.4
16-18 y 2.8-4.6
19 y and older 2.5-4.5
Use:Evaluate phosphorus metabolism.

Click HERE to Report test errors or omissions.
*If no email program is associated with this computer, please contact: for TestID: 545"