Description
Specifications Table
Product Name – Whatman™ Cellulose Filter Paper Grade 602EH
Quantity/Pack Size – 10mmx50m (Pack of 20)
Form – Roll
Grade – 602EH (High Wet Strength)
Application – General lab filtration, gravimetric analysis
Product Overview
Whatman™ Grade 602EH cellulose filter paper is engineered for demanding laboratory applications requiring superior wet strength and chemical resistance. Constructed from high-purity cellulose fibers, this grade maintains structural integrity even when saturated, making it ideal for filtration processes involving aggressive solvents or prolonged exposure to liquids. The 3µm particle retention ensures efficient separation of fine particulates, while the smooth surface minimizes fiber shedding for reliable results. Unlike standard filter papers, 602EH undergoes additional hardening treatments to enhance durability without compromising flow rates. Its neutral pH and low extractables make it compatible with sensitive analytical procedures. The roll format (10mm width) allows for custom cutting to fit various filtration setups, reducing waste. This grade is particularly valued in applications where mechanical stability during filtration is critical, such as vacuum-assisted processes or when handling viscous samples. The consistent thickness and porosity provide reproducible performance across batches, a key requirement for quality-controlled environments. As a cellulose-based product, it offers an economical alternative to synthetic membranes while delivering comparable performance in many routine applications.
FAQs
1. What is the key difference between Grade 602EH and standard Whatman filter papers?
Grade 602EH features enhanced wet strength through a specialized hardening process, allowing it to maintain structural integrity when saturated with liquids or exposed to chemical solvents, unlike standard grades that may tear or deform under similar conditions.
2. Can this filter paper be used with organic solvents like acetone or methanol?
The chemical resistance of 602EH makes it suitable for use with most common organic solvents, though prolonged exposure to highly aggressive solvents may eventually degrade the cellulose matrix. For critical applications, pre-testing with your specific solvent is recommended.
3. What alternatives exist if I need finer particle retention than 3µm?
For applications requiring sub-micron filtration, consider Whatman™ Grade 42 (2.5µm) or Grade 40 (8µm) for coarser particles. Glass microfiber filters like GF/A (1.6µm) offer finer retention but lack the wet strength of cellulose papers.
4. How should unused rolls be stored to maintain performance?
Store in original packaging at room temperature (15-30°C) in a dry environment away from direct sunlight and chemical vapors. Avoid exposure to high humidity, which can cause premature degradation of the cellulose fibers.
5. Is this grade suitable for sterile filtration applications?
While 602EH provides excellent particulate filtration, it is not sterilizing-grade. For sterile applications, use membrane filters with 0.22µm or 0.45µm pore sizes in combination with this paper for pre-filtration.
