| Methodology: |
Spectrophotometry
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| Performed: |
Sun-Sat
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| Reported: |
Within 24 hours
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| Specimen Required: |
Collect: 24-hour urine. Also acceptable: random urine. Refrigerate during collection.
Storage/Transport Temperature: 5 mL aliquot from a well-mixed 24-hour collection at 2-8°C. (Min: 0.2 mL) Submit specimen in an ARUP Standard Transport Tube.
Remarks: Urine pH must be adjusted to > 8.0. If pH is less than or equal to 8.0, adjust pH to > 8.0 by adding 5% NaOH. Mix well and allow entire 24-hour collection to stand for 15 minutes. Recheck pH and readjust if necessary. Record total volume, collection time interval, and pH on transport tube or aliquot tube and on test request form.
Unacceptable Conditions: Specimens with pH < 8.0. Urine collected with acid.
Stability (collection to initiation of testing): Ambient: 4 days; Refrigerated: 4 days; Frozen: 2 weeks
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