Description of Quantitative Cellulose Filter Papers Grade 44
Hawach cellulose filter papers are a star product equivalent to Whatman’s Grade 44 with a more competitive price, which has a high retention rate and a slow flow rate (3μm). Regardless of the size, 3 micron filter paper BIO-44 has lower ash than other filter papers in this series. The efficiency of collecting small particles is slightly lower than that of 2.5 micron filter paper BIO-42, but the flow rate is faster.
Because the cotton fiber in the filter paper has a good affinity with water, it can absorb about 22% of water, of which 6% to 7% of water is combined with cellulose in the form of hydrogen bonds. In general, it is very difficult to remove. Compared with the affinity with water, the affinity of the cotton fiber in the cellulose filter papers with the organic solvent is weaker.
Therefore, in most cases, the paper chromatography method uses the bound water in the filter paper fibers as the stationary phase, and the mobile phase is based on organic solvents. When the mobile phase of the organic solvent passes through the sample, it will continuously distribute the water and the organic phase, and then as the mobile phase continues to move, the substances of various components are continuously redistributed, which further enables the substances to be separated and purified. This use of filter paper is generally common in chemical laboratories.
Features of 3 micron Filter Paper BIO-44
3 micron filter paper Cellulose filter papers Equivalent to Whatman Grade 44 High-purity filters contain 0.009% maximum ash content
Advantages of Laboratory Apparatus Filter Paper Grade 44
ISO9001 & CE double approved Manufactured from alpha-cellulose and high-cotton linters Lowest ashless content: < 0.007% Keep very fine particles Laboratory apparatus filter paper High purity and consistent performance, the quality is equivalent to Whatman, the price is more competitive
Applications of Quantitative 3 micron Filter Paper Grade 44
Pressure filtration Particularly useful for gravimetric analysis Use for laboratory apparatus filter paper Ideal for a variety of important analytical filtration steps