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WHA1440125

Whatman® quantitative filter paper, ashless, Grade 40

circles, diam. 125 mm, pack of 100

Synonym(s):

Whatman filter, Whatman paper, Z241296, filter papers, paper filter

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About This Item

NACRES:
NB.24
UNSPSC Code:
41104900
eCl@ss:
32110505
Material:
circles , cotton filters (high-quality cotton linters)
Pore size:
8 μm (Particle retention)
Packaging:
pack of 100
Diam.:
125 mm
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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
  • 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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