CYSTINE, QUANTITATIVE

Test Documentation
Specimen Required
Collect 24 hour urine, refrigerate during collection. Preserve with 10 g boric acid or 10 mL 6N HCl mix well and send 7.0 mL urine (4.0 mL minimum) refrigerated in a screw-capped plastic urine container. Record total volume on test requisition and specimen label.

Alternate Specimen
Random preserved urine, pH 3-6

Methodology
Immunochemiluminometric Assay

Stability
Room Temperature: 8 days; Refrigerated: 8 days; Frozen: 8 days

Reference Range
10-100 mg/24 hr

Performed
Tuesday, Friday

Turnaround Time5-7 days
Test Code24 hour - UCYSQ, Random - UCYSR
CPT-4 Code (s)
82131
LOINC Codes
2179-0 24 hour
2178-2 random

Warde
Medical
Laboratory