Prepared for use in regulated laboratory conditions, the Filter Circles, Qualitative, Grade 540, with a diameter of 24 mm, belong to the category of Quantitative Filter Papers. Manufactured by Whatman, these filter circles feature a Type Sorte 540, offering a medium filtration rate and a particle retention of 8 µm in liquids. With a basis weight of 88 g/m² and a typical thickness of 160 µm, they provide excellent chemical resistance to strong acids and alkalis, making them suitable for gravimetric analysis of metals in acidic or alkaline solutions, as well as for collecting hydroxides after precipitation by strong alkalis. These filter circles have a filtration time of 200 seconds and a filtration speed They exhibit an ash content less than 0.006%.

• Category: Quantitative Filter Papers
• Typical thickness: 160 µm
• Diameter [mm]: 24
• UNSPSC 13.5: 41104929
• Brand: Whatman
• Filtration speed Herzberg: 200 s
• Ash content: < 0.006 %
• Description: medium
• Particle retention in liquid: 8 µm
• Type: Sorte 540
• Filtration time [s]: 200
• Basis weight: 88 g / m2
• Filter type: filter circle