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

Send 20 mL of 24 hour urine preserved with 10 g Boric acid collected in a plastic urine container.
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Alternate Specimen

24 hour urine preserved with 25 mL of 50% acetic acid or 30 mL of 6N HCl acid submitted in a 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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