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WHA1440150

Whatman® quantitative filter paper, ashless, Grade 40

circles, diam. 150 mm, pack of 100

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Synonym(s):
Whatman filter, Whatman paper, Z241318, filter papers, paper filter
NACRES:
NB.24

material

circles
cotton filters (high-quality cotton linters)

packaging

pack of 100

manufacturer/tradename

Whatman 1440-150
Whatman Article No. 28417995 (US reference)

parameter

0.29 psi wet burst
340 sec/100 mL speed (Herzberg)

diam.

150 mm

thickness

210 μm

ash

≤0.007%

pore size

8 μm (Particle retention)

basis weight

95 g/m2

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1 of 4

This Item
WHA1440110WHA1440125WHA1440012
diam.

150 mm

diam.

110 mm

diam.

125 mm

diam.

12.7 mm

parameter

0.29 psi wet burst, 340 sec/100 mL speed (Herzberg)

parameter

0.29 psi wet burst, 340 sec/100 mL speed (Herzberg)

parameter

0.29 psi wet burst, 340 sec/100 mL speed (Herzberg)

parameter

0.29 psi wet burst, 340 sec/100 mL speed (Herzberg)

pore size

8 μm (Particle retention)

pore size

8 μm (Particle retention)

pore size

8 μm (Particle retention)

pore size

8 μm (Particle retention)

manufacturer/tradename

Whatman 1440-150, Whatman Article No. 28417995 (US reference)

manufacturer/tradename

Whatman 1440-110, Whatman Article No. 28417993 (US reference)

manufacturer/tradename

Whatman 1440-125, Whatman Article No. 28417994 (US reference)

manufacturer/tradename

Whatman 1440-012, Whatman Article No. 28417986 (US reference)

packaging

pack of 100

packaging

pack of 100

packaging

pack of 100

packaging

pack of 400

General description

Whatman quantitative filters are designed for gravimetric analysis and the preparation of samples for instrumental analysis. They are available in three formats designed to meet your specific needs.

Ashless:
0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades - very pure filters suitable for a wide range of critical analytical filtration procedures.

Hardened low ash:
0.015% ash maximum - treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. These filters are particularly suitable for Büchner filtration where the tough smooth surface of the filter makes it easy to recover precipitates.

Hardened ashless:
0.006% ash maximum - acid hardened to give high wet strength and chemical resistance with extremely low ash content. The tough surface makes these filters suitable for a wide range of critical filtration procedures.

Grade 40: 8 μm (medium flow filter paper)

The classic general purpose ashless filter paper with medium speed and retention. Typical applications include gravimetric analysis for numerous components in cements, clays, iron, and steel products; as a primary filter for separating solid matter from aqueous extracts in general soil analysis, quantitative determination of sediments in milk and as a pure analytical grade clean-up filter for solutions prior to AA spectrometry.

Also used as a high-purity filter in the collection of trace elements and radionuclides from the atmosphere.

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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