Measures levels of cystine in urine to detect presence of cystinuria and nephrolithiasis
24 hr urine collection container, no additive
How to collect a 24-hr urine sample
Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp)
24 hr urine collection container with Boric acid
24 hr urine collection container with 6NHCl
Frozen (strict) - 1 year
Liquid chromatography/tandem mass spectrometry (LC/MS-MS)
2.1 - 58.0 mg/24 hours