WHA1004090

Whatman^® qualitative filter paper, Grade 4

circles, diam. 90 mm, pack of 100

• Sinónimos: Z240540, filter papers
• UNSPSC Code: 41104900
• NACRES: NB.24

Propiedades

• material: cellulose filters; circles
• packaging: pack of 100
• manufacturer/tradename: Whatman 1004-090; Whatman Article No. 28414012 (US reference)
• parameter: 0.22 psi wet burst; 37 sec/100 mL speed (Herzberg)
• diam.: 90 mm
• thickness: 205 μm
• ash: ≤0.06%
• pore size: 20-25 μm (Particle retention)
• basis weight: 92 g/m²

Descripción

General description

Whatman Grade 4 Qualitative Filter Papers are a standard grade, high flow rate filter paper.

Excellent retention: captures coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide. Fast filtration: useful for routine clean-up of biological fluids or organic extracts during analysis

Grade 4 Qualitative Filter Papers (20-25 µm particle retention) are available in a variety of sizes and formats including circles, sheets, and rolls. They are also available as prepleated filters, which give improved flow rate and increased loading capacity compared to equivalent flat filters.

Features and Benefits

• Useful in qualitative analytical separations when Fast flow is required and the collection of fine particles is not critical.
• These cellulose filters are used in qualitative analytical techniques to determine and identify materials (e.g., in air pollution monitoring).

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