Whatman^® Quantitative Filter papers, Ashless, Grade 42, Diam. 320 mm, Whatman (CAT#: STEM-L-4492-LC)

The Whatman^® Quantitative Filter Paper, Ashless, Grade 42 manufactured by Whatman is ideal for retention of barium sulfate, metastannic acid, and finely precipitated calcium carbonate for critical gravimetric analysis. The ash is extremely low to 0.007%.

Material: Contton filters, circles
Packaging: Pack of 100
Parameter: 1870 sec/100 mL speed (Herzberg), 0.4 psi wet burst
Diam.: 320 mm
Thickness: 200 μm
Ash: ≤0.007%
Pore size: 2.5 μm (Particle retention)
Basis weight: 100 g/m²

Slow filtration speed

Whatman^® Quantitative Filter papers, Ashless, Grade 42, 25.4 mm × 90 mm, Whatman (CAT#: STEM-L-4493-LC)