Ahlstrom 6420-0550 Qualitative Filter Paper, 2 Micron, Medium Flow, Grade 642, 5.5cm Diameter (Pack of 100)

Ahlstrom's qualitative grades of filter paper are, by definition, recommended for use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative filter papers are often used in routine separation work that still requires high purity and consistent performance. Ahlstrom offers a complete range of low ash filter papers for general laboratory work that provides you with the correct combination of particle retention, filtration speed, loading capacity and wet-strength. All our qualitative grades consist of greater than 95 percent super refined a-cellulose and linter fibers. This grade has finer particle retention than Ahlstrom 601 but with slightly lower filtration speed. Ahlstrom 642 also has higher absorption than Ahlstrom 601. It is used in general laboratory applications to retain particles above 2 micrometer in size. Ahlstrom 642 is also found in agricultural and environmental laboratories for plant growth trials, soil testing, and air analysis for monitoring specific contaminants and in the filtration of organic and sulfide precipitates. 229 sec/100mls Filtration speed herzberg. 30 mls/min Filtration speed rapidity. Medium loading capacity.

A world standard for critical gravimetric analysis with the finest particle retention of all Whatman cellulose filter papers. Typical analytical precipitates include barium sulphate, metastannic acid and finely precipitated calcium carbonate. Retenti...

Used as a rapid filter for clean-up of biological fluids or organic extracts during analysis.Fast filtering with excellent retention of coarse particles and gelatinous precipitates. Compliments No. 1 for air pollution monitoring when high flow rates ...

Very fast filtration for use with coarse and gelatinous precipitates. High wet strength makes this grade very suitable for vacuum assisted fast filtration of ''difficult'' coarse or gelatinous precipitates. Retention: 22µm. Diameter: 18.5cm. 100/Pac...

This Whatman 9.0cm, grade 6, cellulose filter paper is used in qualitative analytical techniques to determine and identify materials. It has excellent fine particle filtration (3µm) in the qualitative range. It is capable of retaining the fine preci...