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Uric Acid, Urine 24 Hour

Mnemonic:    [U24 UricAc]
Name:    Uric Acid, Urine 24 Hour
Specimen:    1 mL aliquot from a 24 hour urine collection. Refrigerate during collection.
Spec Stability:    Stable 4 days refrigerated.
Ref Lab/Code:    ARUP 0020481
  Method:    Quantitative Spectrometry
Note:    This test does not require a preservative during collection.
Processing Info:    Urine pH must be adjusted to greater than 8.0. If pH is less than or equal to 8.0, adjust pH to greater than 8.0 by adding 5 percent NaOH. Mix well and allow entire 24-hour collection to stand for 15 minutes. Recheck pH and readjust if necessary. Transfer one 3 mL aliquot from a well-mixed 24-hour collection to an ARUP Standard Transport Tube. (Min: 0.5 mL) Record total volume, collection time interval, and pH on transport tube or aliquot tube and on test request form.

Collection instructions for a 24 hour urine sample