(Also commonly called SST – Serum Separator Tube)
This is a serum collection tube with a clot activator and gel separator, designed to separate serum cleanly from cells after centrifugation.
Key details:
Additives:
Clot activator (silica)
Polymer gel separator
Sample type: Serum
Cap color: Yellow / Gold (depends on manufacturer)
Mixing: Gently invert 5 times
Common tests:
Routine biochemistry (LFTs, Urea, Creatinine, Lipids)
Hormones
Serology & immunology
Tumor markers
Therapeutic drug monitoring (most drugs)