Test Details

Mnemonic

U17CR

Ordering Code

3424960

CPT-4 Code(s)

83491, 82570, plus 81050 if volume measurement completed

Specimen Information

Collect

24-hour urine (refrigerate during collection)
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Specimen Preparation

Collect 24 hour urine, keep refrigerated during collection. Acidify with 10 grams boric acid or 25 mL 50% Acetic Acid or 6NHCl. Mix well and send 20.0 mL acidified urine refrigerated in a screw-capped plastic urine container.
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Minimum Volume

10.0 mL
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Transport Temperature

Refrigerated
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Rejection Criteria

Unpreserved specimens, specimens past stability
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Stability

Room temperature: 8 hours
Refrigerated: 7 days
Frozen: 30 days
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Methodology

Colorimetric with Porter-Silber reaction
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Reference Range

See report
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Performing Laboratory

Quest SJC
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