WHA1540321

Whatman^® quantitative filter paper, hardened ashless, Grade 540

circles, diam. 21 mm, pack of 100

• Synonym(s): Whatman filter, Z740624, filter paper, paper filter
• UNSPSC Code: 41104900
• NACRES: NB.24

Properties

• material: cellulose ; circles
• feature: Grade 540
• packaging: pack of 100
• manufacturer/tradename: Whatman 1540-321; Whatman Article No. 28418227 (US reference)
• parameter: 200 sec/100 mL speed (Herzberg); 7 psi wet burst
• diam.: 21 mm
• thickness: 160 μm
• ash: ≤0.006%
• pore size: 8 μm (Particle retention)
• basis weight: 85 g/m²

Description

General description

These are the hardened ashless supreme quantitative filter papers featuring high wet strength and chemical resistance. These papers are acid hardened, which reduces ash to an extremely low level. Their tough surfaces make them suitable for a wide range of critical analytical filtration operations. Each grade offers a convenient combination of filtration speed and particle retention.

Grade 540: 8 μm (medium filter paper)
The general purpose hardened ashless filter paper with medium retention and flow rate. Extremely pure and strong with a hard surface. High chemical resistance to strong acid and alkali. Frequently used in the gravimetric analysis of metals in acid/alkali solutions and in collecting hydroxides after precipitation by strong alkalis.

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