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Thumbnail Filmstrip of Quantitative Filter Paper, Grade 541, Hardened Ashless, 20-25um, 185mm Circles, 100/Pk Images
Featuring acid-hardened cellulose construction, this Grade 541 quantitative filter paper delivers fast analytical filtration with a large nominal particle retention of 20 to 25 microns. The hardened, ashless medium combines high wet-strength with strong chemical resistance, making it well suited to filtration of coarse particles and gelatinous precipitates in strongly acidic or alkaline solutions. Each 185mm circle is supplied in a pack of 100.
Key Filter Paper Characteristics
- Hardened ashless cellulose acid-treated during manufacture to deliver extremely low ash content for accurate gravimetric results
- Hydrophilic medium with a nominal particle retention of 20 to 25 microns for fast, coarse-porosity filtration
- High wet-strength surface that withstands handling and pressure filtration through Buchner funnels
- High chemical resistance for use with strong acid and alkali suspensions
- Quantitative grade designed for critical analytical filtration operations
Key Construction Characteristics
- Cellulose filter paper in 185mm diameter circle format
- Nonsterile, supplied 100 discs per pack
- Acid-hardened texture suited to recovery of precipitates retained on the filter surface
This filter paper maintains reliable, repeatable performance across demanding gravimetric and quantitative procedures. Its low ash content helps preserve sample integrity when residues are recovered or combusted, and its durable hardened surface supports a wide range of critical analytical filtration tasks.
- Color
- White
- Diameter
- 185mm
- Flow Speed
- Fast
- Grade
- 541
- Hardened (Yes/ No)
- Yes
- Material
- Cellulose
- Nominal Ash Content (%)
- 0.006
- Pack Count
- 100
- Particle Retention
- 20-25 um
- Pore Size (µm)
- 20.0-25.0
- Qualitative/ Quantitative
- Quantitative
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 541
- Gravimetric Analysis Filters coarse particles and gelatinous precipitates in strong acid or alkali solutions where extremely low ash content is required.
- Metal Determination Supports gravimetric analysis of metals in acidic and slightly alkaline solutions, including pressure filtration applications.
- Cement Testing Used in the quantification of chloride in cement during quality control procedures.
- Coal and Coke Analysis Aids in the determination of chloride and phosphorous content in coal and coke samples.
- Foodstuff Analysis Serves as an animal foodstuff filter for determining fiber content.
- Dairy Analysis Applied in the determination of gelatin content in milk and cream.