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Thumbnail Filmstrip of Quantitative Filter Paper, Grade 542, Hardened Ashless, 320mm, Slow, Nonsterile, 100/Pk Images
Featuring an acid-hardened cellulose medium made from high-quality cotton linters, this Grade 542 quantitative ashless filter paper delivers high retention of fine particles under chemically demanding conditions. Each 320mm circle provides a 2.7 micron nominal particle retention with a slow flow rate, making it well suited for capturing fine precipitates during gravimetric analysis. The hardened structure provides high wet strength and strong chemical resistance to acid and alkali suspensions, while the ashless formulation leaves an extremely low residue after ignition for reliable mass-based determinations.
Key Filter Paper Characteristics
- Hydrophilic cellulose: Manufactured from high-quality cotton linters for high alpha-cellulose purity and consistent wetting.
- 2.7 micron nominal retention: Captures fine particles and precipitates with a slow flow rate for demanding analytical filtration.
- Acid-hardened structure: Provides high wet strength and tough surfaces that withstand strong acid and alkali solutions.
- Ashless formulation: Extremely low ash content leaves minimal residue after ignition, supporting accurate gravimetric results.
- Smooth, durable surface: Facilitates clean precipitate recovery and transfer during quantitative procedures.
Key Construction Characteristics
- Format: 320mm diameter circles.
- Grade: Quantitative, hardened ashless, Grade 542 (Whatman equivalent).
- Sterility: Nonsterile.
- Pack: 100 pieces per pack.
This grade maintains consistent retention and flow characteristics that support reproducible gravimetric methods. Its low residue and high mechanical integrity preserve sample integrity through ignition and precipitate transfer, delivering reliable results across critical analytical workflows.
- Color
- White
- Diameter
- 320mm
- Flow Speed
- Slow
- Grade
- 542
- Hardened (Yes/ No)
- Yes
- Material
- Cellulose (cotton linters)
- Mesh Format
- Circle
- Nominal Basis Weight (g/ m²)
- 96
- Nominal Thickness (µm)
- 150
- Pack Count
- 100
- Particle Retention
- 2.7 um
- Pore Size (µm)
- 2.7
- Qualitative/ Quantitative
- Quantitative
- Sterility
- Nonsterile
- Wet Strengthened (Yes/ No)
- Yes
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 542
- Gravimetric Metal Determination Captures fine metal precipitates for ignition-based mass quantification in analytical laboratories.
- Hydroxide Collection Retains fine hydroxide precipitates in chemically harsh acid and alkali solutions for quantitative analysis.
- Fine Precipitate Filtration Provides slow-flow, high-retention filtration of fine precipitates requiring careful recovery.
- Total Ash Determination Delivers an ultra-low blank for accurate ash testing of food, pharmaceutical, and material samples.
- Pressure and Vacuum Filtration Hardened wet-strength construction supports filtration under pressure and in Buchner funnels.
- Trace Analysis Sample Prep Low-residue ashless medium clarifies samples ahead of trace element and gravimetric analysis.