(August 17, 2009) — Thermo Fisher Scientific, the world leader in serving science, today introduced the Thermo Scientific Pierce Concentrators for convenient protein concentration, desalting and buffer exchange. The unique design of the Pierce® Concentrators consists of a high-performance regenerated cellulose membrane fused to a conical device. This design greatly improves the concentration factor achieved in a single centrifugation step and minimizes polarization and adsorption at the membrane surface. The Pierce Concentrators result in concentration factors of greater than 110-fold in less than 45min with the 20ml device. The same concentration is achieved in 30min with the 7ml device.

The Pierce Concentrators are compatible with swinging-bucket and fixed-angle rotors and are accurately rated for molecular weight cut-off (MWCO), routinely providing greater than 90% recovery of proteins larger than the membrane MWCO. The Pierce Concentrators are available with MWCOs of 9K, 20K or 150K.

The Pierce Concentrators are supplied in packs of ten or 25 devices. The 7ml size device accommodates sample volumes of 1ml-7ml; the 20ml size device covers 5ml-20ml sample volumes.

For more information on the new line of Pierce Concentrators, visit www.thermo.com/pierce or contact us.