Which color tube top is used for serum with a gel separator?

Which color tube top is used for serum with a gel separator?

• A. Red
• B. Gold
• C. Gray
• D. Green

Answer: (B)

Gold-colored top tubes are used for serum with a gel separator. These are serum separator tubes (SST) that contain a clot activator to promote clotting and a gel that, after centrifugation, forms a barrier between the serum and the blood cells. This separation helps keep the serum stable and free from cellular contamination for many chemistry tests. In contrast, red tops usually lack the gel barrier, gray tops are designed for glycolysis inhibition for glucose testing, and green tops contain heparin for plasma work and don’t provide the gel-based separation. So, the gold top is the one that provides serum with a gel separator.

Gold-colored top tubes are used for serum with a gel separator. These are serum separator tubes (SST) that contain a clot activator to promote clotting and a gel that, after centrifugation, forms a barrier between the serum and the blood cells. This separation helps keep the serum stable and free from cellular contamination for many chemistry tests. In contrast, red tops usually lack the gel barrier, gray tops are designed for glycolysis inhibition for glucose testing, and green tops contain heparin for plasma work and don’t provide the gel-based separation. So, the gold top is the one that provides serum with a gel separator.