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Thumbnail Filmstrip of Quantitative Filter Paper Discs, Grade 541, Hardened Ashless, 150mm, Nonsterile, 100/Pk Images
Featuring acid-hardened cellulose, these Grade 541 quantitative filter paper discs deliver fast filtration of coarse particles and gelatinous precipitates in demanding analytical workflows. Each 150mm circle provides a 20.0 to 25.0 micron nominal particle retention, balancing rapid flow with reliable separation. Hardened ashless construction reduces ash content to an extremely low level, ensuring no contaminants are introduced during gravimetric weighing. Supplied nonsterile in convenient packs of 100.
Key Filter Paper Media Characteristics
- Hardened ashless cellulose: acid treatment lowers ash content to an extremely low level for accurate gravimetric results.
- Fast filtration speed: coarse porosity supports rapid processing of heavily loaded and gelatinous samples.
- 20.0 to 25.0 micron nominal retention: captures larger particles and gelatinous precipitates while maintaining high flow.
- High wet strength: the tough, hardened surface withstands handling and Buchner funnel filtration.
- High chemical resistance: suitable for use with strong acid and alkali suspensions.
Key Construction Characteristics
- Material: acid-hardened cellulose, ashless grade.
- Format: 150mm diameter circles.
- Sterility: nonsterile.
- Pack: 100 discs per pack.
These discs maintain consistent retention and flow across critical analytical filtration operations, protecting sample integrity from contamination. Their hardened texture allows recovery of precipitates retained on the filter surface, supporting accurate quantitative and gravimetric analysis.
- Color
- White
- Diameter
- 150mm
- Flow Speed
- Fast
- Grade
- 541
- Hardened (Yes/ No)
- Yes
- Material
- Acid-Hardened Cellulose (Ashless)
- Nominal Ash Content (%)
- 0.006
- Pack Count
- 100
- Particle Retention
- 20.0-25.0 um
- Pore Size (µm)
- 20.0-25.0
- Qualitative/ Quantitative
- Quantitative
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 541
- Gravimetric Analysis The extremely low ash content allows accurate weight determination of precipitates after combustion.
- Strong Acid and Alkali Filtration High chemical resistance and wet strength support filtration of aggressive acidic and alkaline suspensions.
- Gelatinous Precipitate Recovery Fast flow and coarse porosity handle gelatinous and coarse precipitates without clogging.
- Cement and Coal Testing Used for chloride determination in cement and chloride and phosphorous analysis in coal and coke.
- Food and Feed Analysis Applied to fiber content determination in animal foodstuffs and gelatin content in milk and cream.
- Buchner Funnel Filtration High wet strength makes these discs well suited to vacuum filtration in Buchner funnels.