Filters and retains extremely small particles. Whatman™ Quantitative Filter Paper: Grade 42 Circles are suitable for processes that require ashing.
Ashless grades are very pure filters suitable for a wide range of critical analytical filtration procedures. Whatman™ quantitative filter papers are designed for gravimetric analysis and the preparation of samples for instrumental analysis.
Ashless: 0.007% ash maximum
Fine (2.5 µm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation
Herzberg filtration speed of 1870 s
Commonly used as a calcium carbonate filter
Specifications
96 s/100 mL/in2
Grade 42 Ashless Filter Paper for Instrumental Analysis, 125 mm circle (100 pcs)
100 Pack
125 mm
High-quality Cotton Linters
1870 sec.
Fine
Designed for gravimetric analysis and the preparation of samples for instrumental analysis.For critical gravimetric analysis with the finest particle retention.