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Typical properties
| Minimum retention efficiency in air (% @ 0.3 µm) |
≥99.85 |
| Typical retention efficiency in air (% @ 0.3 µm) |
≥99.99 |
| Typical particle retention in liquid (µm)¹ |
1.6 |
| Nominal air flow (s/100 mL/in²) |
4.3 |
| Nominal thickness (µm) |
260 |
| Nominal basis weight (g/m²) |
53 |
| Maximum recommended temperature (°C) |
550 |
| Typical water flow rate (mL/min)² |
143 |
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Ordering information – binder-free glass microfiber grades - Filter Circles
| Dimensions (mm) |
Catalog number |
Quantity/Pack |
| 13 |
1820-8013 |
100 |
| 21 |
1820-021 |
100 |
| 24 |
1820-024 |
100 |
| 25 |
1820-025 |
100 |
| 32 |
182082964 |
100 |
| 34 |
18209000864 |
80 |
| 34 |
1820-100264 |
100 |
| 37 |
1820-037 |
100 |
| 42.5 |
1820-042 |
100 |
| 47 |
1820-047 |
100 |
| 50 |
1820-050 |
100 |
| 55 |
1820-055 |
100 |
| 60 |
1820-0614 |
100 |
| 60 |
1820-060 |
100 |
| 70 |
1820-070 |
100 |
| 81 |
1820-6537 |
100 |
| 90 |
1822-090 |
100 |
| 110 |
1820-110 |
100 |
| 125 |
1820-125 |
100 |
| 150 |
1820-150 |
100 |
| 240 |
1820-240 |
100 |
4 Filter in holder for personal air samplers
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Ordering
Offers fine particle retention and high flow rate, as well as good loading capacity. Used for high-efficiency general purpose laboratory filtration, including water pollution monitoring of effluents, for filtration of water, algae and bacteria cultures, food stuff analyses, protein filtration, and radioimmunoassay of weak ß emitters. Recommended for gravimetric determination of airborne particulates, stack sampling, and absorption methods of air pollution monitoring.
Whatman Grade GF/A card-mounted filters are used in static sample and personal air sampler applications. These aerosol sampling and particulate monitoring filters provide high flow rates and minimal sample interference.
