material
circles , cotton filters (high-quality cotton linters)
packaging
pack of 100
manufacturer/tradename
Whatman 1440-125, Whatman Article No. 28417994 (US reference)
parameter
0.29 psi wet burst, 340 sec/100 mL speed (Herzberg)
diam.
125 mm
thickness
210 μm
ash
≤0.007%
pore size
8 μm (Particle retention)
basis weight
95 g/m2
General description
Whatman® Grade 40 high-purity filters from Cytiva are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.
Application
Applications for high-purity Grade 40 filters
Soil analysis, when separating solid matter from aqueous extracts
- High-purity filters support accurate analysis in applications sensitive to very low levels of background contamination and in gravimetric analysis where ash content might affect weight measurements of combusted samples.
- Cytiva′s high-purity Whatman Grade 40 ashless paper is suited to:
Soil analysis, when separating solid matter from aqueous extracts
- Quantitative determination of milk sediment
- Use as a clean-up filter for solutions prior to atomic absorption (AA) spectrometryAnalysis of constituent components in cements, clays, iron, and steel products
- Collection of trace elements and radionuclides from the atmosphere
Features and Benefits
High-purity filters contain 0.007% maximum ash content, Medium filtration speed (Herzberg 340 s), Medium nominal particle retention rating of 8 µm, Particularly useful for gravimetric analysis
- High-purity filters contain 0.007% maximum ash content
- Medium nominal particle retention rating of 8 µm
- Medium filtration speed (Herzberg 340 s)
- Particularly useful for gravimetric analysis
Other Notes
Field of Use : For internal research use only. Products are not intended for diagnostic use or resale.
Legal Information
Whatman is a registered trademark of Cytiva
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