Centrifuge Tubes - Centrifugal Filtration News

Wolflabs Vivaproducts :: New category 'Centrifuge Tubes - Centrifugal Filtration'

Models include; Vivaspin 2, Vivaspin 4, Vivaspin 6, Vivaspin 15, Vivaspin 15R, Vivaspin 20, and Vivaspin 500

Introduction
Vivaproducts Vivaspin 500 centrifugal filtration centrifuge tubes from Wolflabs. Vivaspin 500 µl centrifugal filter units offer a simple, one step procedure for sample preparation. They can effectively be used in a fixed angle rotors accepting 2.2 ml centrifuge tubes. The patented vertical membrane design and thin channel filtration chamber (US 5,647,990), minimises membrane fouling and provides high speed concentrations, even with particle laden solutions.

Features and benefits
- High flux PES membrane
- High retentate recovery > 90 %
- Vertical membrane design for ultra fast concentration
- Universal rotor compatibility
- Safe sample concentration due to dead-stop volume
- Convenient concentrate recovery by pipetting
- Volume graduation for easy reading/monitoring

Introduction
Vivaproducts Vivaspin 15R centrifugal filtration centrifuge tubes from Wolflabs. Vivaspin 15R is the latest member of the Vivaspin product family with all the unique features of Sartorius Stedim Biotech concentrators including a patented vertical membrane and a dead stop. Vivaspin 15R is targeting the volume segment 2 to15 ml with a modified regenerated cellulose membrane; Hydrosart. This membrane is ideal where extremely high recovery with very low adsorption is needed, for example in applications such as desalting and concentration of Ig fractions.

Features and benefits
- Ultimate recovery at low adsorption (95-98%)
- Extremely short concentration time (30x in 15 min.)
- Convenient application protocol with easy handling
- Easy scale-up to Vivaflow 200 with Hydrosart membrane for volumes up to 5 litres
- Very small hold up volume (< 20 µl)

Introduction
New Vivaspin Turbo 4 centrifugal filtration centrifuge tubes from Vivaproducts have been added. Vivaspin Turbo 4 is the newest member of the ultrafiltration family and allows the fastest sample concentration with the highest recoveries.

Features and benefits
- This device can handle up to 4 ml sample volumes in swing-bucket rotors and in fixed-angle rotors that accept 15 ml centrifuge tubes.
- The Vivaspin Turbo 4 optimized design and sleek internal profile ensure maximum process speeds all the way down to the last few microliters, resulting in more than 100-fold concentration.
- The UV joining technology ensures smooth joint transition between the membrane and the plasting housing – allowing removal of the entire sample concentrated in the unique, pipette-friendly dead-stop pocket.

Introduction
Vivaproducts Vivaspin 20 centrifugal filtration centrifuge tubes from Wolflabs. Ultrafiltration unit with unique twin membrane for sample concentration with high process flexibility: centrifugation or centrifugation of pressurized units, as well as pressure filtration in stationary benchtop mode.

Features and benefits
- High flux PES membrane
- High retentate recovery > 90 %
- Vertical twin membrane for ultra-fast concentration
- Universal rotor compatibility
- Safe sample concentration due to dead-stop volume
- Convenient concentrate recovery by pipetting
- Volume graduation for easy reading/monitoring
- 100-fold concentration with twin vertical membranes
- Additional option for pressurized operation

Introduction
Vivaproducts Vivaspin Turbo 15 centrifugal filtration centrifuge tubes from Wolflabs. Vivaspin Turbo 15 can handle up to 15 ml sample volume in swing bucket rotors and 11ml in fixed angle rotors accepting 50 ml centrifuge tubes.

Features and benefits
- Sleek internal design as well as large vertical twin membranes for ultra fast concentration
- High retentate recovery > 95 %
- pH 1-14 suited polystyrene housing with high chemical compatibility
- High flux PES membrane
- Universal rotor compatibility
- Safe sample concentration and easy recovery due to unique, angular and pipette friendly dead-stop pocket
- Volume graduation for easy detection / monitoring of the concentrate volume
- > 100-fold concentration with twin vertical membranes

Introduction
Vivaproducts Vivaspin 2 centrifugal filtration centrifuge tubes from Wolflabs. The Vivaspin 2 bridges the gap between the 500 µl and 4 ml centrifugal concentrators. This device combines the speed of the classic Vivaspin products with low internal surface and membrane area for superior recoveries from very dilute solutions.

Features and benefits
- Available with a choice of polyethersulfone, cellulose triacetate and Hydrosart membranes, Vivaspin 2 offers the highest flexibility for process optimisation.
- Also unique to the Vivaspin 2, is the choice of directly pipetting the concentrate from the dead stop pocket built into the bottom of the concentrator, or alternatively reverse spinning into the concentrate recovery cap which can then be sealed for storage.

Introduction
Vivaproducts Vivaspin 6 centrifugal filtration centrifuge tubes from Wolflabs. Vivaspin 6 centrifugal concentrators have been developed to offer increased volume flexibility and performance. Vivaspin 6 can process an impressive 6ml in either swing bucket or fixed angle rotors accepting standard 15ml conical bottom test tubes.

Features and benefits
- High flux PES twin membranes
- High retentate recovery > 90 %
- Vertical membrane design for ultra fast concentration
- Universal rotor compatibility
- Safe sample concentration due to dead-stop volume
- Convenient concentrate recovery by pipetting
- Volume graduation for easy reading/monitoring
- > 100-fold concentration with twin vertical membranes