Buffer solutions, especially EDTA buffers, play an important role in in vitro diagnostics and special laboratory applications. They are used to ensure a stable pH environment, which is essential for the optimal function of enzymes and other biological molecules. EDTA buffers are particularly useful in applications such as DNA sequencing, protein purification, immunostaining and cell culture. They help prevent coagulation by interfering with the binding of calcium ions, which are necessary for clotting reactions. In addition, EDTA buffers ensure the maintenance and stability of many molecules and enzymes, making them indispensable components in many laboratory processes.