Whatman™ Quantitative Filter Paper: Grade 42 Circles
Filters and retains extremely small particles. Whatman™ Quantitative Filter Paper: Grade 42 Circles are suitable for processes that require ashing.
Manufacturer: Whatman™ 1442055
Paper, Filter; Whatman; Quantitative; Grade 42; Ashless circles; Part 2; Particle retention: 2.5μm; Filtration speed: Herzberg: 1870 seconds; 55mm dia.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
|High-quality Cotton Linters|
|Highly retentive, for very fine precipitates. Normal loading; limited wet strength. Laboratory standard for critical gravimetric analysis|