WHA1443090
Whatman® quantitative filter paper, ashless, Grade 43
circles, diam. 90 mm, pack of 100
Sinonimo/i:
Whatman filter, Z740519
About This Item
Prodotti consigliati
Materiali
circles
cotton filters (high-quality cotton linters)
Confezionamento
pack of 100
Produttore/marchio commerciale
Whatman 1443-090
Whatman Article No. 28418057 (US reference)
Parametri
0.6 psi wet burst
155 sec/100 mL speed (Herzberg)
Diametro
90 mm
Spessore
220 μm
Ceneri
≤0.007%
Dimensione pori
16 μm (Particle retention)
Grammatura
95 g/m2
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Categorie correlate
Descrizione generale
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.
Caratteristiche e vantaggi
- 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
Altre note
Note legali
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