Whatman Laboratory Filter Paper

About Whatman Laboratory Filter Paper

Minimum order quantity: 1 Pack

Whatman Filter Papers (manufactured by Cytiva/GE Healthcare) are high-quality cellulose-based papers used for filtration in laboratories. They are known for their consistent performance, purity, and precise particle retention, making them a global standard for scientific filtration.

• High purity cellulose  minimal extractables that could interfere with experiments

• Controlled pore size  ensures accurate and reproducible filtration

• Uniform thickness and weight  consistent flow rate and retention

• Available in various grades  used for different filtration needs

• Compatible with chemical analysis, microbiology, and environmental testing

• Popular Whatman Filter Paper Grades & Their Uses1. Grade 1 General Purpose Filter Paper

  • Pore size: ~11 m

  • Description: Most widely used paper for routine filtration

  • Applications:

    • Qualitative analysis

    • Removing coarse particles

    • Clarifying solutions

    • Soil, feed, and food testing

  2. Grade 2

  • Pore size: ~8 m

  • Description: Slower flow with finer retention

  • Applications:

    • Fine precipitate collection

    • Chemical analysis requiring cleaner filtrate

    • 3. Grade 4 Fast Filtration

      • Pore size: ~2025 m

      • Description: Very fast flow; suitable for large particles

      • Applications:

        • Collecting precipitates in environmental testing

        • Rapid filtration of viscous samples

        • Fiber analysis

      4. Grade 40, 41, 42 Ashless Filter Papers

      Used for gravimetric analysis where residue must be extremely low.

      Grade 40 (Medium)

      • Retention: ~8 m

      • Application: Moderate-rate quantitative analysis

      Grade 41 (Fast)

      • Retention: ~20 m

      • Application: Fast filtration of heavy precipitates

      Grade 42 (Fine)

       

      • Retention: ~2.5 m

      • Application: Fine precipitates (most precise)

      • 5. Whatman GF Glass Fiber Papers

        • Material: Borosilicate glass microfibers

        • Properties: Heat-resistant, high particle loading capacity

        • Applications:

          • Air pollution monitoring

          • Water quality testing

          • DNA/RNA extraction

         General Applications of Whatman Filter Papers

         

        • Solution clarification

        • Precipitate collection

        • Gravimetric analysis

        • Environmental water testing

        • Microbiology sample preparation

        • Food and agricultural testing

        • Air pollution monitoring

        • Summary

           

          Whatman Laboratory Filter Papers are reliable, high-performance filtration media used in nearly every type of laboratory. Their wide range of grades, pore sizes, and materials makes them suitable for everything from basic filtration to advanced scientific analysis.