Filter papers are designed for the preparation of samples and gravimetric analysis. Used for quantitative analysis, we have filter papers made of refined pulp and linter with alpha-cellulose content.
As the classic general purpose ashless filter paper with a medium-speed filtering rate, our BIO-40 high-purity quantitative filter papers are suitable for typical applications to include gravimetric analysis for numerous components and for all kind of pre-filtrations.
With a high rate of filtration, wide-pored, soft, spongy structure, extremely low-ash content, our Ltd BIO-41 fast-speed ashless filter paper is particularly suitable for analytical procedures and tests involving large particles or gelatinous precipitates.
With slow filtering rate and fine particle retention, such as our BIO-42 with Particle retention of 2.5μm and BIO-44 with particle retention of 3.0μm, slow-speed ashless filter papers are for typical analytical precipitates such as cold barium sulfate, lead sulfate, zinc and nickel sulfides, etc.
BIO-43 ashless quantitative filter with medium-fast filtration speed and good retention of medium and thick particles is suitable for gravimetric measurements in food and soil analysis, X-ray fluorescence detection, etc..
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