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Phosphorus, Urine

Order Code CH170
Turnaround Time 24-48 hours
Test Includes

Phosphorus, Urine

Specimen Requirements
Specimen Source
Transport Container
(Specimen Container)

Plastic urine container

Preferred Specimens
Random urine
Minimum Volume (uL)
2 mL
Collection Instructions
(Transport Temperature)
Preserved: Room temperature Unpreserved: Refrigerated (cold packs)
Specimen Stability
Temperature Period
Room temperature Preserved = 6 months; Unpreserved= 48 hours
Refrigerated Preserved = 6 months; Unpreserved= 7 days
Frozen Preserved = 6 months; Unpreserved= 28 days
Special Instructions

Adjust pH to <3.0 with 6N HCl prior to aliquoting for phosphate testing

Alternative Specimen(s)
Urinalysis transport tube (yellow-top, blue fill line, preservative tube). Transport preserved urine at Room Temperature. Transport Unpreserved urine Refrigerated.

Test Details
Spectrophotometry (SP)_x000D_
Clinical Significance

Phosphate, Random Urine without Creatinine – Phosphorus is present in many foods with a mean intake of approximately 1500 mg per day for adult males and about 1000 mg per day for adult females. Absorbed phosphate, under the influence of parathyroid hormone is readily excreted in the kidney. Measurement of urinary phosphorus generally reflects dietary intake hence day to day excretion may show considerable variation.

Reference Ranges

Not established