You can spin plasma at 3000g for 5 to 15 min (depending on sample volume)

Thanks! And then how I can validate the purity of the plasma? Tarun Tyagi

You can check it on hemocytometer using Trypan blue dye at 20X objective and look for any round bright dots

I was employed in a plasma donation center as the responsible physician and head of production for five years, where these questions were everyday and can only support the two previous answers.