Specifications Table

Product Name – Whatman EPM-2000 Filter Paper
Quantity/Pack Size – 4.7CM (Pack of 100), 46x57CM (Pack of 50), 8x10IN (Pack of 100)
Form – Circular/Sheet
Grade – Quantitative, Acid-Washed, Ashless
Application – Gravimetric analysis, environmental testing, food/beverage filtration

Product Overview

The Whatman EPM-2000 filter paper is engineered for high-performance filtration in laboratory settings, combining superior retention efficiency with minimal extractables. Constructed from 100% pure cellulose fibers, this filter paper undergoes rigorous acid-washing to eliminate trace metals and organic impurities, ensuring ultra-low ash content (<0.007%) for accurate gravimetric analysis. Its medium flow rate and 2-3 ?m particle retention make it versatile for both coarse and fine particulate separation without clogging. The uniform porosity and consistent thickness (180 ?m) provide reproducible results across batches, critical for quantitative applications. Unlike standard filter papers, the EPM-2000?s reinforced wet strength prevents tearing during prolonged filtration, while its chemical resistance allows compatibility with aggressive solvents like dilute acids and alkalis. The paper?s smooth surface minimizes sample loss, and its pre-pleated options (where applicable) enhance filtration speed for high-volume samples. Whether used in Buchner funnels or manual setups, this filter paper maintains integrity under vacuum pressures up to 700 mmHg, reducing processing time. Its neutral pH and absence of binders or additives ensure it won?t interfere with sensitive assays or spectrophotometric measurements. Designed for repeatability, each sheet meets ISO 9001 standards, with lot-specific certification available for traceability in regulated environments.

FAQs

1. What is the maximum temperature the Whatman EPM-2000 filter paper can withstand during autoclaving?

The EPM-2000 can be autoclaved at 121?C for standard cycles without compromising its structural integrity or filtration efficiency. Prolonged exposure above 130?C may cause slight degradation of the cellulose fibers.

2. Can this filter paper be used with organic solvents like acetone or methanol?

Yes, the EPM-2000 is compatible with most organic solvents, including acetone, methanol, and ethanol, due to its chemical stability. However, avoid prolonged contact with strong oxidizing agents like concentrated nitric acid, which may degrade the cellulose.

3. How does the EPM-2000 compare to Whatman Grade 42 in terms of particle retention?

The EPM-2000 offers finer particle retention (2-3 ?m) compared to Grade 42 (2.5 ?m), making it better suited for applications requiring higher precision. It also has a lower ash content, which is critical for gravimetric analysis where residue interference must be minimized.

4. Is this filter paper suitable for sterile filtration in microbiology labs?

While the EPM-2000 can be autoclaved for sterility, it is not designed as a sterile filter (e.g., 0.22 ?m pore size). For microbiological applications requiring absolute sterility, consider using membrane filters or pre-sterilized depth filters instead.

5. What is the typical filtration speed for this grade, and how can it be improved?

The EPM-2000 has a medium flow rate (~30-50 seconds for 100ml water under gravity). Filtration speed can be enhanced by pre-wetting the paper with solvent, using vacuum assistance, or selecting the pleated version for increased surface area.