Characterized by well-defined physical properties suited for technical use, the Fillter Circles, Qualitative, Grade 542, Ø 90 Mm are designed for applications requiring slow filtration. These filter circles, manufactured by Whatman, have a basis weight of 93 g/m² and a typical thickness of 150 µm. They exhibit exceptional particle retention in liquid, capable of filtering particles as small as 2.7 µm. With an ash content of less than 0.006%, these filters offer excellent chemical resistance, making them suitable for various laboratory applications, particularly gravimetric metal determinations. Their slow filtration speed, as indicated by a filtration time of 2510 seconds, ensures precise results under demanding conditions.

• Category: Quantitative Filter Papers
• Typical thickness: 150 µm
• Filtration time [s]: 2510
• Description: slow
• UNSPSC 13.5: 41104929
• Filter type: filter circle
• Basis weight: 93 g / m2
• Filtration speed Herzberg: 2510 s
• Diameter [mm]: 90
• Brand: Whatman
• Type: Sorte 542
• Ash content: < 0.006 %
• Particle retention in liquid: 2.7 µm