Sodium Citrate Blood Collection Tube 1:9 3.2% Coagulation Light Blue Product Overview Sodium Citrate 1:9 Blood Collection Tube is a light-blue-top coagulation tube designed for blood sample collection in laboratory coagulation testing. The tube contains 3.2% sodium citrate , with a blood-to-anticoagulant ratio of 9:1 , providing controlled anticoagulation by binding calcium ions in the blood sample. This configuration is commonly used for coagulation analysis, including