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Whatman™ Grade GF/A glass microfiber filters, binder-free
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thickness: 0.26 mm
pore size: 1.6 μm
Specifications:
| Application | Filtration, Analytical Chemistry |
| Storage Temperature | Room Temperature |
| Product Type | Filter Papers |
| Product Brand | Whatman™, Cytiva |
| Product Grade | Analytical grade |
The Whatman™ Grade GF/A Glass Microfiber Filters are high-performance, binder-free filtration media designed for applications requiring fine particle retention, high flow rates, and excellent loading capacity. Manufactured from borosilicate glass microfibers without binders, these filters offer superior purity and minimal extractables, making them ideal for analytical, environmental, and biological applications.
With a nominal particle retention of ~1.6 µm (98% efficiency), GF/A filters provide reliable removal of fine particulates while maintaining rapid filtration speeds—especially suited for large-volume sample processing.
Key Features
Binder-Free High Purity
- Free from binders to minimize leachables and contaminants
- Ensures high purity for sensitive analytical applications
- Ideal for trace analysis and biological workflows
Fine Particle Retention
- Nominal retention of ~1.6 µm (98% efficiency)
- Effective removal of fine particulates, bacteria, and suspended solids
- Suitable for both liquid and air filtration
High Flow Rate & Loading Capacity
- Supports rapid filtration of large sample volumes
- High dirt-holding capacity reduces clogging
- Enhances efficiency in high-throughput workflows
Borosilicate Glass Microfiber Structure
- Chemically stable and resistant to most solvents
- Provides consistent and reliable filtration performance
- Suitable for diverse laboratory and industrial applications
Wide Range of Formats
- Available in circular and sheet formats
- Multiple diameters for compatibility with standard filtration setups
- Optional reinforced rim variants for improved handling
Applications
- Water and wastewater filtration
- Air pollution monitoring and particulate analysis
- Food and beverage analysis
- Filtration of algae and bacterial cultures
- Protein filtration and biochemical assays
- Radioimmunoassay (RIA) applications
- Gravimetric determination of airborne particulates
- Environmental and analytical laboratory workflows
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Glass Microfiber Filter (Binder-Free) |
| Grade | Whatman GF/A |
| Material | Borosilicate glass microfiber |
| Binder | None (binder-free) |
| Particle Retention | ~1.6 µm (98% efficiency) |
| Filtration Speed | High |
| Loading Capacity | High |
| Format | Circles / Sheets |
| Application | Air and liquid filtration, analytical workflows |
Available Models and Ordering Information (Selected)
Circular Filters
| Catalog Number | Diameter | Pack Size |
|---|---|---|
| 1820-021 | 21 mm | 100/pk |
| 1820-025 | 25 mm | 100/pk |
| 1820-037 | 37 mm | 100/pk |
| 1820-042 | 42.5 mm | 100/pk |
| 1820-047 | 47 mm | 100/pk |
| 1820-055 | 55 mm | 100/pk |
| 1820-060 | 60 mm | 100/pk |
| 1820-070 | 70 mm | 100/pk |
| 1820-090 | 90 mm | 100/pk |
| 1820-110 | 110 mm | 100/pk |
| 1820-125 | 125 mm | 100/pk |
| 1820-150 | 150 mm | 100/pk |
| 1820-240 | 240 mm | 100/pk |
Sheet Formats
| Catalog Number | Dimensions | Pack Size |
|---|---|---|
| 1820-866 | 8 × 10 in | 100/pk |
| 1820-915 | 460 × 570 mm | 25/pk |
Workflow Integration
Sample Collection → Filtration (GF/A Filter) → Filtrate Collection → Analysis (PCR / Spectroscopy / Gravimetric / Biochemical Assays)
This ensures:
- Efficient removal of fine particulates
- High throughput for large-volume samples
- Reliable analytical results
Unique Advantages
- Binder-free design ensures maximum purity and minimal contamination
- Combines fine retention with high flow rate, ideal for large sample volumes
- Excellent loading capacity reduces clogging and increases efficiency
- Suitable for both air and liquid filtration applications
- Versatile formats for laboratory and industrial workflows
- Trusted Whatman™ quality for analytical precision
The Whatman™ Grade GF/A Glass Microfiber Filters (Binder-Free) are a versatile and high-performance solution for laboratories requiring fine particulate retention, high throughput, and analytical purity. With their binder-free composition, high flow rate, and broad application compatibility, they are an essential filtration tool for environmental monitoring, biological research, and analytical testing.
- Size: 21 mm circles 25 mm circles 37 mm circles 42.5 mm circles 47 mm circles 55 mm circles 60 mm circles 70 mm circles 110 mm circles 125 mm circles 240 mm circles 203 × 254 mm Sheets 90 mm circles 150 mm circles 13 mm circles