WHA1443090

Whatman^® quantitative filter paper, ashless, Grade 43

circles, diam. 90 mm, pack of 100

• Synonym(s): Whatman filter, Z740519
• NACRES: NB.24

Properties

• material: circles ; cotton filters (high-quality cotton linters)
• packaging: pack of 100
• manufacturer/tradename: Whatman 1443-090; Whatman Article No. 28418057 (US reference)
• parameter: 0.6 psi wet burst; 155 sec/100 mL speed (Herzberg)
• diam.: 90 mm
• thickness: 220 μm
• ash: ≤0.007%
• pore size: 16 μm (Particle retention)
• basis weight: 95 g/m²

Description

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 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.

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