One 7.5 mL serum separator tube (SST). Also acceptable: One 7 mL green top tube (lithium heparin) or one 4.5 mL plasma separator tube (PST).
Handling:
Allow to clot, centrifuge SST or PST within 2 hours of collection and transport in original tube. Centrifuge green top (heparin) tube within 2 hours of collection and separate plasma from cells into a plastic vial for transport. Refrigerate.
Standard Volume:
2 mL serum or plasma.
Minimum Volume:
0.5 mL serum or plasma.
Transport:
Refrigerated.
Comments:
Hemolyzed specimens produce falsely elevated phosphorus values.