| Methodology: |
Quantitative Colorimetry
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| Performed: |
Tue, Fri
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| Reported: |
3-7 days
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| Specimen Required: |
Collect: 24-hour urine. Refrigerated during collection. Also acceptable: Random urine. Reported as mg/L and have no reference interval.
Specimen Preparation: Transfer 12 mL aliquot of urine from a well-mixed 24-hour collection to ARUP Standard Transport Tubes. Also acceptable: Specimens refrigerated with preservatives are acceptable. Sample pH must be 5.0 - 7.0. Mix well, add 1 g boric acid/100 mL urine, adjust pH (with boric acid) to 5.0-7.0 and freeze. Record total volume, collection time, and pH on transport tube and test request form.
Storage/Transport Temperature: Frozen.
Unacceptable Conditions: Alkali preservatives (e.g. specimens previously preserved with NaOH).
Stability (collection to initiation of testing): Ambient: 4 hours (with preservative); Refrigerated: 1 week (with preservative); Frozen: 1 month
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