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Plasma Separation Membrane 

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Cobetter OneStep Plasma Separation Membrane (PSM) is designed and engineered for medical-use quick plasma separation by gravity filtration. With a remarkable asymmetric structure, the polyethersulfone composed OneStep Plasma Separation Membrane (PSM) has various superiorities, including:

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  • Extraordinary Hydrophilicity
  • Outstanding Flow Rate, No-Need of Pretreatment
  • High RBC Retention Efficiency, No Hemolysis
  • Low Protein Adsorption & Low Target Analytes Binding
  • Optimizing Test Blood Volume & High Plasma Recovery Rate
  • Excellent Chemical Compatibility
  • Consistent Performance & Lower CV
  • No-Need of Upstream Centrifugation


Cobetter RB Series, composed of glass fiber, is recommended as another option for quick blood separation, especially for filtering large volume samples. As a blood separation membrane,  Cobetter RB Series is capable to be used exclusively or as a pre-filtering layer in various cases. The superiorities include:

Blood Plasma Separation Filter
  • Outstanding Flow Rate, No-Need of Pretreatment
  • Remarkable Blood Volume Capacity
  • High Temperature Resistance
  • High Retention Efficiency
  • Non-Hygroscopicity & Excellent Biological Compatibility


Popular Applications

  • Blood Plasma separation layer at diagnostic POCT test strips
  • Immunochromatographic test strips-blood plasma separation filter
  • Upstream blood sample filter at a microfluidic chip/lab on a chip


As the occupancy and reputation increases, Cobetter has developed various solutions of surface treatment for the plasma filtration membrane, indicating our capability of customizing plasma separation membrane product into a variety of filters according to every single specific requirement from our customers.







For technical data sheet or application inquiry, you are more than welcome to contact our sales representative by sales@cobetterfilter.com or leave a message