Quantitative Filter Paper, Ashless

Whatman Grade 589/2 White Ribbon ashless filter paper can be used when medium fine precipitates are being collected and papers must be ashed to support analysis. Grade 589/2 is suitable for a variety of routine quantitative analysis methods, such as determination of the sand content in foodstuffs, flour analysis, and aqueous suspension analysis in the paper industry....

Whatman No. 44, quantitative ashless. Thin version of Grade 42 retaining very fine particles (3 µm) but with lower ash weight per sample and almost twice the flow rate as Grade 42. 100 circles/box.

Whatman No. 42 is a world standard for critical gravimetric analysis with the finest particle retention (2.5 µm) of all Whatman cellulose filter papers. Typical analytical precipitates include barium sulfate, metastannic acid and finely precipitated calcium carbonate. 100 per box.

Whatman No. 40 is the classic general purpose quantitative ashless filter paper with medium speed and retention (8 µm). Typical applications include gravimetric analysis for numerous components in cements, clays, iron and steel products; as a primary filter for separating solid matter from aqueous extracts in general soil analysis, quantitative determination of sediments in...