Specimen Requirements

**Plasma or serum AND urine are required for this test. Plasma or serum specimen should preferably be drawn at the end of the 24-hour period of urine collection.**

Urine Specimen
Container/Tube: Plastic urine container
Minimum Volume: 0.5ml 
Collection Instructions: Patient’s height and weight and starting and ending times of collection are required. No preservative. Refrigerate specimen during collection, and send specimen refrigerated. 

AND

Blood Specimen

Preferred:
Container/Tube: Green cap-yellow ring Top (Lithium Heparin Gel) tube
Minimum Volume: 1.0 mL 
Collection Instructions: Centrifuge within 2 hours.
Also Acceptable:
Container/Tube: Plain, Red Top or Serum gel (SST-Gel) tube