Whatman Grade 1 Qualitative Filter Paper covers a wide range of laboratory applications, frequently used for clarifying liquids. It is widely used in education for teaching simple qualitative analytical separations.
A widely used standard grade filter paper for routine applications with medium retention and flow rate. It covers a wide range of laboratory applications and is frequently used for clarifying liquids.
These filter papers are designed for gravimetric analysis and the preparation of samples for instrumental analysis. The classic general-purpose ashless filter paper with medium speed and retention.
Whatman Grade 40 high-purity filters are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.
With the finest retention of all Whatman ashless filter paper grades, Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.
Whatman Grade 540 is a high-purity, acid-treated cellulose lab filter paper. Mechanically strong Grade 540 is well suited for quantitative or gravimetric analysis of strongly acidic or alkaline samples.
High-purity glass microfiber thimbles manufactured from 1% pure borosilicate glass are available for specialized applications. The thimbles are completely free of binders or additives and can be used at temperatures up to 500 degrees C or when using solvents that are incompatible with cellulose thimbles.
Whatman Plain Cellulose Nitrate Membrane Filters have excellent flexibility and low level of extractables to ensure sample integrity. The narrow pore size distribution of these filters provide for improved surface capture and analysis.
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