EDTA anticoagulant tube purple cap, ethylenediamine tetraacetic acid (EDTA, molecular weight 292), and its salt are amino polycarboxylic acids that can effectively chelate calcium ions in blood samples. Cheating calcium or removing the calcium reaction site will block and terminate the endogenous or exogenous coagulation process to prevent the coagulation of blood samples.What is a Purple Top Blood Collection Tube?A purple top blood collection tube, also known as a lavender top tube, is a type of evacuated blood collection tube that contains ethylenediaminetetraacetic acid (EDTA) as an anticoagulant. These tubes are primarily used for hematological tests and are essential in various laboratory settings to ensure accurate and reliable blood analysis.The Use of Different Purple top Blood Collection TubeVolume/mlSize/mmAdditiveSeparatorMaterialCap ColorClosure2ml13X75EDTA K2 / EDTA K3/PET/GLASSPurple Cap TubeSafety Cap Rubber or Rubber Stopper3ml13X75EDTA K2 / EDTA K3/4ml13X75EDTA K2 / EDTA K3/5ml13X75EDTA K2 / EDTA K3/6ml13X100EDTA K2 / EDTA K3/7ml13X100EDTA K2 / EDTA K3/8ml16X100EDTA K2 / EDTA K3/9ml16X100EDTA K2 / EDTA K3/10ml16X100EDTA K2 / EDTA K3/If You Need a Customized customized Blood collection tube, Please Contact UsWhat is a purple top blood collection tube?A purple top blood collection tube, also known as a lavender top tube, contains ethylenediaminetetraacetic acid (EDTA) as an anticoagulant. It is primarily used for hematological tests, such as complete blood counts (CBC), by preventing blood from clotting.How does EDTA in purple top tubes work?EDTA works by chelating calcium ions in the blood, which are necessary for the coagulation process. By binding to these ions, EDTA prevents clot formation, allowing for accurate testing of blood components.Are there different types of purple top tubes?Yes, there are two main types of purple top tubes: K2 EDTA and K3 EDTA. K2 EDTA contains two potassium ions and is more commonly used due to its lower hyperosmolarity, which minimizes artifacts in blood cell morphology.
