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HelpTest Code PHORU Phosphate, Random Urine without Creatinine [14579X]
Specimen Required
10 mL random urine preserved,
Specimen Minimum Volume
2 mL
Specimen Stability
Preserved Urine Room temperature: 6 months Refrigerated: 6
months Frozen: 6 months
Unpreserved Urine Room temperature: 48 hours Refrigerated: 7 days
Frozen: 28 days
Day(s) and Time(s) Performed
Daily
Method Name
Spectrophotometry (SP)
Collection Container / Tube
Preferred: Urinalysis transport tube (yellow-top, blue fill
line, preservative tube)
Other Acceptable Container: Unpreserved Random Urine in leakproof
container
Transport / Storage Conditions
Preserved urine: Room temperature
Unpreserved urine: Refrigerated (cold packs)
Special Instructions
Adjust pH to <3.0 with 6N HCl prior to aliquoting for phosphate testing.
Reference Values
Not established
CPT Codes
84105
Clinical Reference
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.
Analytic Time
Next Day