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Cytiva Whatman™ Qualitative Filter Paper: Grade 4 Circles
Filters and retains coarse particles for monitoring air pollution. Whatman™ Qualitative Filter Paper: Grade 4 Circles are used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

Thickness (Metric) | 210 μm |
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Pore Size | 20 to 25 μm |
Flow Rate | Fast |
Particle Retention | 25 μm |
Format | Disc |
Grade | Grade 4 |
Material | Cellulose |
Porosity | Medium |
Filtration Speed | 37 sec. |
Cytiva Whatman™ Mini-UniPrep™ Syringeless Filters with Preslit Septa
Processes sample loads in one-third the time. Whatman™ Mini-UniPrep™ Syringeless Filters with Preslit Septa provide a faster and easier way to remove particulates from samples being prepared for HPLC and UHPLC analysis.

For Use With (Application) | Routine HPLC/UHPLC analysis; Composite assays; Content uniformity; Protein precipitation; Solubility testing; Dissolution testing; Sample filtration; Standard robotics on HPLC instruments with sensitive needles, allowing for higher throughput; Light sen |
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Cytiva AcroPak™ 200 Capsules with Supor™ Membrane
AcroPak capsules designed for research applications only.

Pore Size | 0.8/0.2 μm |
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Material (Membrane) | Hydrophilic PES |
Quantity | 3/Pk. |
Sterility | Sterile |
Filtration Area | 200 cm2 |
Cytiva Acrodisc™ PSF Syringe Filters with Versapor Membrane
Syringe filters for use in cell culture and other sensitive biological research.

Cytiva Carbon Capsule - 100 g Activated Carbon
Carbon capsule not approved for use in medical, clinical, surgical or other patient applications.

Thermo Scientific™ Nalgene™ Rapid-Flow™ Sterile Disposable Bottle Top Filters with PES, CN, SFCA or Nylon Membranes
Greener Choice Product
This product offers one or more environmental benefits itemized in the U.S. FTC Green Guides.
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This product offers one or more environmental benefits itemized in the U.S. FTC Green Guides.
Learn More About the Greener Choice Program
Achieve fast flow rates and high throughput for increased filtration efficiency with Nalgene Rapid-Flow sterile disposable bottle top filters.
Disposable | Single-use |
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Type | Bottle Top Filter |
No. per Case | 12 |
Material | Polystyrene |
Filter Type | Membrane Filter |
No. per Pack | 12 |
Fit for Purpose | Sterile |
Sterility | Sterile |
DWK Life Sciences Kimble™ Kontes™ Ultra-Ware™ Microfiltration Assembly with Fritted Glass Support (25mm)
Designed to handle small volumes of liquids for analysis of particulate or microbiological contamination
Cytiva Whatman™ HEPA-Vent Filter
Strengthened glass filter media by dual lamination with a tough polyester monofilament. Whatman™ HEPA-Vent Filters are ideal for air and gas filtration applications where high retention, dirt-holding capacity and flow rates are required.
Cytiva Whatman™ ReZist Air Venting Filter, 50mm, PTFE, 0.2μm, sterile
Lightweight air venting units suitable for protective vents in-line filtration, and isolation applications when working with chemicallly harsh solvents
Cytiva Whatman™ Polycap Disposable Capsules, 36 AS
Provides highly effective filtration area in a small size. Whatman™ Polycap Disposable AS Capsules, AS 36 filters large volumes and difficult samples with ease.
Housing Material | Polypropylene |
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Material (Membrane) | Nylon |
For Use With (Application) | Filtration of aqueous solutions (such as cell culture media, serum enzymes and water) and removal of bacteria and debris. |
Max. Pressure | 4.1 bar (60 psi) |
Filtration Area | 400 cm2 |
Cytiva Whatman™ Qualitative Filter Papers: Grade 2555½ Pleated Circles
Maintains flow rate with reduced contact between filter and funnel. Whatman™Grade 2555½ Pleated Circles are medium fast filter papers used for the filtration of the mash for the determination of the extract in malt and wort and for removing carbon dioxide from beer.
Thickness (Metric) | 170 μm |
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Particle Retention | 12 μm |
Type | Qualitative Filter Paper |
Format | Pre-pleated Circle |
Grade | Grade 2555 ½ |
Material | Cellulose |
Filtration Speed | Approx. 55 s |
For Use With (Application) | A medium fast filter paper used for the filtration of the mash for the determination of the extract in malt and wort and for removing carbon dioxide from beer. |
Cytiva Whatman™ 1573-1/2 Qualitative Filter Paper
Savings in time required to quadrant-fold circles to fit conical filter funnels in repetitive or multiple analyses
Cytiva Whatman™ Puradisc™ 13mm Sterile Syringe Filters
Whatman™ Puradisc™ 13mm Sterile Syringe Filters may be used for biological and HPLC sample preparation.
Type | Syringe Filter |
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Diameter (Metric) | 13 mm |
Volume (Metric) | Up to 10 mL |
Pressure Rating | 5.2 bar (75 psi) |
Autoclavable | Autoclavable |
Sterility | Sterile |
Filtration Area | 1.3 cm2 |
Cytiva Whatman™ Binder-Free Glass Microfiber Prefiters, Grade GF/D
Functions as a prefilter when used with GF/B microfiber filters. Whatman™ Binder-Free Glass Microfiber Prefilters, Grade GF/D provide efficient membrane protection, especially during liquid scintillation counting.
Particle Retention | 2.7 μm |
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Temperature (English) Max. | 932°F |
Shape | Circle |
Description | GE’s Whatman Grade GF/D fine membrane filters are thick and offer good loading capacity. GF/D can also function as a prefilter when used with GF/B, and it comes in many sizes to fit most filter holders. |
Temperature (Metric) Max | 500°C |
Grade | Grade GF/D |
Material | Borosilicate Glass |
Thickness (Metric) | 675 μm |
Flow Rate | 2.6 s/100mL/in2 |
Type | Prefilter |
Basis Weight | 121 g/m2 |
Format | Disc |
Thickness (English) | 0.02 in. |
Autoclavable | Autoclavable |
Waterflow Rate | 681 mL/min |
Cytiva Whatman™ Three-piece Filter Funnel
Features quick and easy filtration. Whatman™ Three-piece Filter Funnels dismantle quickly for the insertion of a new filter. Funnels are available with a choice of three plates and come in several sizes.
Includes | Acrylic plate |
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Type | Filter Funnel |
Material | Polypropylene |