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WHA1443090

Whatman® quantitative filter paper, ashless, Grade 43

circles, diam. 90 mm, pack of 100

Sinônimo(s):

Whatman filter, Z740519

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About This Item

Código UNSPSC:
41104900
NACRES:
NB.24

Materiais

circles
cotton filters (high-quality cotton linters)

embalagem

pack of 100

fabricante/nome comercial

Whatman 1443-090
Whatman Article No. 28418057 (US reference)

Parâmetros

0.6 psi wet burst
155 sec/100 mL speed (Herzberg)

Diâmetro

90 mm

espessura

220 μm

cinzas

≤0.007%

tamanho de poro

16 μm (Particle retention)

peso base

95 g/m2

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Descrição geral

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 43: 16 μm (medium to fast filter paper)
Intermediate in retention between Grades 40 and 41, and twice as fast as Grade 40. Typical applications include foodstuffs analysis; soil analysis; particle collection in air pollution monitoring for subsequent analysis by XRF techniques; and inorganic analysis in the construction, mining and steel industries.

Características e benefícios

  • Very low ash content (0.007% ash concentration maximum)
  • Intermediate particle retention rating of 16 µm
  • Herzberg filtration speed of 155 s
  • Particle collection between that of Grades 40 and 41

Outras notas

Field of Use : For internal research use only. Products are not intended for diagnostic use or resale.

Informações legais

Whatman is a registered trademark of Cytiva

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