Hi Atchara, My name is Eilysh and I am a Product Manager at STEMCELL Technologies.
Thank you for your question. To collect plasma for further analysis, use SepMate as instructed and then pipette off as much plasma as required after centrifugation. Please remember to pipette off the plasma before pouring the sample containing PBMCs into a new tube. Learn more about the protocol here: https://www.stemcell.com/products/brands/sepmate.html.
I hope this helps! If you have any more questions, feel free to email us at [email protected].