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| Size/SKU | Availability | Price |
|---|---|---|
100 ea | Estimated to ship onSeptember 08, 2026fromMILWAUKEE | $82.40 |
About This Item
$82.40
Estimated to ship onSeptember 08, 2026Details
material
circles , cotton filters (high-quality cotton linters)
packaging
pack of 100
manufacturer/tradename
Whatman 1442-125, Whatman Article No. 28418044 (US reference)
parameter
0.40 psi wet burst, 1870 sec/100 mL speed (Herzberg)
diam.
125 mm
thickness
200 μm
ash
≤0.007%
pore size
2.5 μm (Particle retention)
basis weight
100 g/m2
General description
Whatman Grade 42 quantitative papers from Cytiva business are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.
Other typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Cytiva′s Grade 42 filters also makes them suitable for processes that require ashing.
Application
- Environmental analysis: soil filtration analysis, when separating solid matter from aqueous extracts
- Retention of small particles
- Collection of trace elements and radionuclides from the atmosphere
Features and Benefits
- Ashless: 0.007% ash maximum
- Fine (2.5 µm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation
- Herzberg filtration speed of 1870 s
- Commonly used as a calcium carbonate filter
- Particularly suitable for gravimetric analysis
Other Notes
Legal Information
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This Item | |||
|---|---|---|---|
| description circles, diam. 125 mm, pack of 100 | description circles, diam. 110 mm, pack of 100 | description circles, diam. 55 mm, pack of 100 | description circles, diam. 90 mm, pack of 100 |
| pore size 2.5 μm (Particle retention) | pore size 2.5 μm (Particle retention) | pore size 2.5 μm (Particle retention) | pore size 2.5 μm (Particle retention) |
| diam. 125 mm | diam. 110 mm | diam. 55 mm | diam. 90 mm |
| manufacturer/tradename Whatman 1442-125, Whatman Article No. 28418044 (US reference) | manufacturer/tradename Whatman 1442-110, Whatman Article No. 28418043 (US reference) | manufacturer/tradename Whatman Article No. 28418040 (US reference), Whatman 1442-055 | manufacturer/tradename Whatman 1442-090, Whatman Article No. 28418042 (US reference) |
| material cotton filters (high-quality cotton linters), circles | material cotton filters (high-quality cotton linters), circles | material circles , cotton filters (high-quality cotton linters) | material cotton filters (high-quality cotton linters), circles |
| parameter 0.40 psi wet burst, 1870 sec/100 mL speed (Herzberg) | parameter 0.40 psi wet burst, 1870 sec/100 mL speed (Herzberg) | parameter 0.40 psi wet burst, 1870 sec/100 mL speed (Herzberg) | parameter 0.40 psi wet burst, 1870 sec/100 mL speed (Herzberg) |
| packaging pack of 100 | packaging pack of 100 | packaging pack of 100 | packaging pack of 100 |
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