Ge Bio-Science Vivaspin Sample Concentrators Pack 28-9322-23 by GE Healthcare Bio-Sciences GROUP: Lab Equipment & Accessories:Sample Collection & Processing:Tubes/Vials/Cuvettes Item Description: Concentrator, PES Membrane, 500ml, 5 kDa MWCO, 25/pk (Ships on ice) Packaging Desc: Concentrator Pes Membran 500Ml5Kda Mwco 25/Pack Country of Origin: Harmonized Tariff Code: Product Description: Vivaspin provides fast, nondenaturing concentration of biological samples by membrane ultrafiltration. The entire process is carried out in a single tube ensuring convenient sample handling and reduced sample loss. Recovery of the target molecule typically exceeds 95%. Patented dead-stop technology ensures that samples cannot be concentrated to dryness. The vertical polyethersulfone membrane minimizes membrane blockage and tolerates high flow rates.