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)
Specimen Preparation
Send 20 mL of 24 hour urine preserved with 10 g Boric acid collected in a plastic urine container.
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.
Minimum Volume
10.0 mL
Transport Temperature
Refrigerated
Rejection Criteria
Unpreserved specimens, specimens past stability
Stability
Room temperature: 8 hours
Refrigerated: 7 days
Frozen: 30 days
Refrigerated: 7 days
Frozen: 30 days
Methodology
Colorimetric with Porter-Silber reaction
Reference Range
See report
Performing Laboratory
Quest SJC