Platelet Counting Solution consists of an aqueous base in which ammonium oxalate and mercury(II) chloride (sublimate) are dissolved. The solution is used in medical laboratory diagnostics to determine the number of platelets (thrombocytes) in blood samples, an important parameter for assessing blood clotting function.

The chemical operation of this solution is based on the ability of ammonium oxalate to lyse erythrocytes (red blood cells) while leaving platelets intact. Mercury(II) chloride acts as a preservative and ensures the stability of the solution. Lysis of the red cells reduces the background for platelet counting, allowing for more accurate determination.

The special suitability of Platelet Counting Solution lies in its ability to distinguish platelets from other blood cells, allowing for accurate counting. The solution is suitable for use in various counting methods, such as manual counting under a microscope or use in automated hematology analyzers. The combination of ammonium oxalate and mercury(II) chloride in the Platelet Counting Solution contributes to the stability and reliability of the solution, ensuring accurate measurement results.