WHA1542070

Whatman^® quantitative filter paper, hardened ashless, Grade 542

circles, diam. 70 mm, pack of 100

• Synonym(s): Whatman filter, Z241458, filter paper, paper filter
• UNSPSC Code: 41104900
• NACRES: NB.24

Properties

• material: circles ; cotton filters (high-quality cotton linters)
• packaging: pack of 100
• manufacturer/tradename: Whatman 1542-070; Whatman Article No. 28418248 (US reference)
• parameter: 2510 sec/100 mL speed (Herzberg); 6 psi wet burst
• diam.: 70 mm
• thickness: 150 μm
• ash: ≤0.006%
• pore size: 2.7 μm (Particle retention)
• basis weight: 93 g/m²

Description

General description

These are the supreme hardened ashless 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 542: 2.7 μm (slow filter paper)
High retention of fine particles under demanding conditions. Slow flow rate. Very hard and strong with excellent chemical resistance. Often used in gravimetric metal determinations.

Features and Benefits

• High wet-strength
• Acid-hardened for resistance to strong acid and alkali solutions
• Nominal particle retention rating of 2.7 µm
• Herzberg filtration speed of 2510 s
• Extremely low ash content (0.006% ash maximum)

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