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Spectrum introduces the Spectra/Por® Float-A-Lyzer® G2, the next generation in Ready-to-Use laboratory dialysis devices featuring proprietary Ultra-pure Biotech Cellulose Ester (CE) Membrane.

  • 95 - 98% Sample Recovery
  • Highest Membrane Purity
  • Superior Handling & Leak Prevention
  • Volume Specific Dilution Control
  • Complete & Ready-to-Use
  • Perfect for dialyzing electro-eluted proteins or chromatography fractions

Sample Recovery, Purity and Dilution Control

Spectrum's proprietary Biotech Grade CE is a low protein-binding synthetic membrane available in 9 precise MWCO's with no heavy metal and sulfide contaminants. The cylindrical tubing geometry prevents sample dilution (associated with cassette-type devices) and provides open access for total volume retrieval by pipette. Only the Float-A-Lyzer G2 assures a 95-98% sample recovery while maintaining 99% sample purity and <1% sample dilution.

Designed for Ease-of-Use and Leak Prevention

The leak-proof screw-on cap with sealing o-ring provides easy access with included pipette for loading, in-process testing and sample retrieval, without the risk of needle punctures. The included floatation ring improves sample buoyancy and vertical orientation during dialysis. The sleek design allows multiple samples to be dialyzed in the same reservoir.

No additional kits, buoys or accessories need to purchased separately. The Float-A-Lyzer G2 is packaged dry and ready-to-go with all components included.

  • Rinse with water
  • Load sample with Pipette
  • And dialyze


Screw-on Cap:Open & close for in-process sampling

Color-coded for MWCO

Silicon O-ring:Leak proof & resealable
Floatation Ring:Device body inserts through center to maintain buoyancy in buffer

Top/Bottom Piece:Polycarbonate
Membrane:3 volume-specific sizes
Sample Loading:Disposable pipette for 5 & 10 ml (included)
Pipette tip for 1 ml (not included)

Product Specifications

Membrane Type:Biotech grade Cellulose Ester (CE)
9 MWCO's:0.1-0.5 kD, 0.5-1 kD, 3.5-5 kD, 8-10 kD, 20 kD, 50 kD, 100 kD, 300 kD, 1000 kD
Pkg & Qty:Dry with glycerol, 12/pkg


3 Volume Sizes:1 ml5 ml10 ml
Working Volume:0.8 ml - 1.3 ml4.0 ml - 5.5 ml8.0 ml - 11.0 ml
Total Length:5 cm10 cm16 cm
Membrane Dia.:10 mm10 mm10 mm
Top Piece Dia.:23 mm23 mm23 mm
Flotation Ring:38 mm38 mm38 mm

Ordering Information: Spectra/Por Float-A-Lyzer G2 Click part no. to add to cart

REQUEST FREE SAMPLE: Samples of the 1 ml Float-A-Lyzer G2 are available, click on an S to order. Limit 1 per customer.

MWCOMaximum Sample VolumeQty

Color Code1 ml5 ml10 ml
CE0.1 - 0.5 kDGreenG235025SG235049G23506112/pkg
0.5 - 1 kDOrangeG235027SG235051G235063
3.5 - 5 kDBlackG235029SG235053G235065
8 - 10 kDYellowG235031SG235055G235067
20 kDRedG235033SG235057G235069
50 kDVioletG235034SG235058G235070
100 kDBlueG235035SG235059G235071
300 kDAmberG235036SG235060G235072
1000 kDPinkG235037SG235062G235073

Price (US$):$125.40

Click on any part number for pricing information or to place an order.

Use a credit card on-line and get a 10% discount! Details here.

Lab Dialysis Resources:

Product Literature
Findamentals of Dialysis
Membrane Selection Guide
Frequently Asked Questions (FAQs)
Ready-to-Use Dialysis Comparison
Chemical Compatibility
Pore Size Chart
Application Notes


Micro FloatALyzer
for 100-500 ul volumes
Learn More >

Spectra/Gel® Absorbent
for sample concentration

Learn More >

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