Hawach BIO-42 filter paper is equivalent to Whatman filter paper Grade 42 with a more competitive price, which has a high retention rate and a slow flow rate (pore size: 2.5μm). The finest particle retention in all Hawach laboratory filter paper. Commonly used for the determination of the elemental content of minerals such as barium sulfate, metastannic acid, calcium carbonate, barium carbonate, filtration of gasoline or organic solvents, and filtration preparation of spectral and chromatographic samples, such as atomic absorption (AAS) determination of the second laurel in the feed.
Laboratory filter paper is a medium-speed filter paper that retains fine particles in cellulose filter paper. Commonly used for the analysis of fine particle sediments such as barium sulfate, metastannic acid, and calcium carbonate. Filter paper used in the laboratory can use the determination of the content of dibutyltin acid. Similarly, cellulose filter paper grade 44 is also possible.
Features of Filter Paper 42 Used in Laboratory
No. 42 filter paper is ideal for repetitive or multiple analyses in the laboratory;
Particularly useful for gravimetric analysis;
Supplied in sheets, discs, as well as folded formats;
High-purity filters contain 0.0009% maximum ash content;
Slow filter paper is equivalent to Whatman filter paper Grade 42;
Slow filtration speed and the nominal particle retention rating of 2.5 μm.
Advantages of Filter Paper Used In Laboratory
Filter paper used in the laboratory is acid-washed and has an extremely low ash content;
High quality with cost-effective;
FDA-grade manufacturing capabilities;
Full range of diameter and OEM service available.
Precipitates of the specific gravity analysis;
Barium sulfate, stannic acid, and fine precipitated calcium carbonate, and other;
Widely used methods to prepare samples for further testing using many types of instrumentation.
Hawach Scientific Co., Ltd
Guide for Filter Paper
Ash Content (%)
Basis Weight (g/m2)
Wet Burst (mm H2O)
Grade 42, slow flow rate
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