Collect 24 hr. Send 10 mL aliquot of 24 hr. Write total 24 hr. volume on aliquot bottle and on request slip. Draw 1 FULL Light Blue top tube. Transport to lab within 2 hours.
Any further delay requires separation and freezing of plasma in a plastic tube.
Any anticoagulants must be noted when ordering test. 2 mL serum. 1 mL serum. The 24 hour collection should be collected in 6N HCl. Separate plasma from cells.