Prometheus™ Ultra-15 disposable centrifugal filter devices provide fast ultrafiltration and easy concentrate recovery from dilute and complex sample matrices. They are ideal for protein purification, protein concentration & desalting. The vertical design and available membrane surface area provide fast sample processing, high sample recovery (typically >90% of dilute starting solution), and the capability for 80-fold concentration.

Typical processing time is 15 to 60 minutes depending on Molecular Weight Cutoff (MWCO). A physical dead-stop in the filter device prevents spinning to dryness and potential sample loss. The concentrate is collected from the filter device sample reservoir using a pipettor, while the ultrafiltrate is collected in the provided centrifuge tube. The device can be spun in a swinging-bucket or fixed-angle rotor. Ultra-15 devices are supplied non-sterile and are for single use only.