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Test Code LAB427 Phosphate, Urine, Random

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Colorimetric (Phosphomolybdate) 
Literature Reference:

Package insert: Inorganic phosphorus reagent PHOS2. Roche Corporation, 04/2022.

Specimen Requirements

Specimen Type: Urine, random
Container/Tube: Urine Complete Cup Kit
Specimen Volume: 10 mL

 

Collection Instructions: No additive.
Additional Information: See Urine Collection information under General Information.

Day(s) Test Set Up

Monday through Sunday
Turnaround Time:
STAT: 1 hour after receipt in laboratory
Routine: 2 to 4 hours after receipt in laboratory

Test Classification and CPT Coding

84105

Reference Values

No established reference range

Literature Reference:

1. Rifai N, Horvath AR, Wittwer AT eds: Textbook of Clinical Chemistry and Molecular Diagnostics 6th ed: Chapter 59, p. 1256, Elsevier, St. Louis, MO 2018.

2. Rifai N, Horvath AR, Wittwer AT eds: Textbook of Clinical Chemistry and Molecular Diagnostics 6th ed: Chapter 64, p. 1422, Elsevier, St. Louis, MO 2018.

Specimen Transport Temperature

Ambient

Additional Information

For BJH Laboratory Use Only

Analyte Stability:

Specimen must be kept refrigerated before delivery to limit bacterial growth.

Laboratory Processing Instructions:

Test performed in BJH Core Lab. Using 13x100 test tubes, prepare a 7-mL aliquot. If pH is >4, add 6 N HCl in 1 drop increments until the pH is between 2.5 and 4.0. Do not over adjust. Heat for 10 minutes at 56° C. Deliver to the automated line for centrifugation and delivery to Cobas 8000 for analysis. Completed 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 urine 2778-9