Hi everyone! I'm looking for some advice on stable isotope sample collection. I would like to separate plasma form blood cells for stable isotope analysis.
The problem is that it will take me more that a couple of hours to get back to the lab to centrifuge the samples.
My question is: how long can the blood samples be kept in ice before being centrifuge? and also: do I need to use heprin?
Thank you very much! Rocío