One 5 mL plain red (no gel) top tube. Also acceptable: Plasma collected in: lavender (EDTA), royal blue (EDTA), dark green (sodium heparin) or light green (lithium heparin) top tube.

1 mL serum refrigerated (Min: 0.25 mL)

* Collection Instructions *

• Separate serum after clotting.
• Do not submit glass tubes.
• Any early morning specimen is preferred.

Ambient: 72 hours

Refrigerated: 28 days

Frozen: 2 years

• Gross hemolysis
• Samples collected in serum separator tubes (SST)
• Glass tubes