WHA1004055

Whatman^® qualitative filter paper, Grade 4

circles, diam. 55 mm, pack of 100

• Synonym(s): Whatman filter, Whatman filters, Whatman paper, Z240524, filter paper, filter papers, paper filter
• UNSPSC Code: 41104900
• NACRES: NB.24

Properties

• material: cellulose filters; circles
• packaging: pack of 100
• manufacturer/tradename: Whatman 1004-055; Whatman Article No. 28414010 (US reference)
• parameter: 0.22 psi wet burst; 37 sec/100 mL speed (Herzberg)
• diam.: 55 mm
• thickness: 205 μm
• ash: ≤0.06%
• pore size: 20-25 μm (Particle retention)
• basis weight: 92 g/m²

Description

General description

These cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.

Grade 4: 20-25 μm, (very fast filter paper)
Extremely fast filtering with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide. Very useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis. Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

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