5mL Centrifugal Filter Units with Low Binding PES Membrane, >90% Recovery, DNase, RNase & Pyrogen-Free

Alkali Scientific™ 5 mL disposable ultrafiltration centrifugal devices provide a fast and efficient solution for protein concentration, desalting, and buffer exchange of biological samples. Featuring a 50 kDa nominal molecular weight limit (NMWL) membrane, these devices enable effective sample processing while achieving over 90% recovery.

Designed for medium-volume applications, the device supports a maximum initial volume of 5 mL and concentrates samples down to a final volume of approximately 50–100 µL. Its single-use polypropylene construction ensures durability and chemical resistance, while compatibility with both swinging-bucket and fixed-angle rotors allows for versatile use. With a maximum RCF of 4,000 × g for swinging-bucket rotors and 5,000 × g for fixed-angle rotors, these devices offer reliable ultrafiltration performance.

Material Composition:

• Outer Tube: Polypropylene (PP)
• Filter: Methacrylate-butadiene-styrene (MBS)
• Filter Membrane: Polyethersulfone (PES)
• Tube Cap: High-density polyethylene (HDPE)

Key Features:

• • 50 kDa NMWL membrane for effective protein concentration
  • Over 90% sample recovery for high-efficiency processing
  • Single-use polypropylene construction ensures durability and chemical resistance
  • Compatible with swinging-bucket and fixed-angle rotors for versatile use
  • Maximum initial volume: 5 mL
  • Maximum RCF: 4,000 × g (swinging-bucket rotor), 5,000 × g (fixed-angle rotor)
  • Typical final concentrate volume: 50–100 µL
  • Fast processing for protein concentration, desalting, and buffer exchange
  • 100% tested for production line air tightness to ensure reliability

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