Description
Specifications Table
Product Name – Whatman ME25/21 Membrane Filter
Quantity/Pack Size – 50MM, 0.45uM (Pack of 100) | 47MM, 0.45uM (Pack of 100)
Form – Circular Membrane Disc
Grade – Mixed Cellulose Esters (MCE)
Application – Sterile Filtration, Particle Analysis, Microbiology
Product Overview
The Whatman ME25/21 Membrane Filter is engineered for high-efficiency filtration in laboratory settings, combining durability with precision. Constructed from mixed cellulose esters (MCE), this filter offers a 0.45?m pore size, making it highly effective for retaining fine particles, bacteria, and contaminants while allowing liquids to pass through efficiently. The membrane?s uniform structure ensures consistent flow rates and reliable performance, reducing the risk of clogging or premature failure during critical procedures. Its compatibility with a wide range of solvents and aqueous solutions further enhances its versatility in diverse applications. The filter?s smooth surface minimizes sample loss, ensuring accurate results in analytical processes. Available in standard diameters of 47MM and 50MM, each pack contains 100 discs, providing ample supply for repetitive or large-scale experiments. The Whatman ME25/21 is designed to meet stringent quality standards, offering low extractables and minimal background interference, which is essential for sensitive assays. Whether used in routine lab work or specialized research, this membrane filter delivers consistent, high-purity filtration, making it a trusted choice for professionals who demand precision and reliability in their filtration needs.
FAQs
1. What is the material composition of the Whatman ME25/21 Membrane Filter?
The Whatman ME25/21 Membrane Filter is made from mixed cellulose esters (MCE), a blend of cellulose acetate and cellulose nitrate, which provides a balance of strength, chemical compatibility, and filtration efficiency.
2. Can this filter be used with organic solvents?
Yes, the Whatman ME25/21 Membrane Filter is compatible with a variety of organic solvents, including alcohols, hydrocarbons, and mild acids, though it is always recommended to verify compatibility for specific solvents before use.
3. What is the difference between the 47MM and 50MM variations?
The primary difference is the diameter of the filter discs. The 47MM version is slightly smaller and may fit specific filtration apparatuses designed for that size, while the 50MM offers a larger surface area for higher sample volumes.
4. How should these filters be stored to maintain their integrity?
Store the filters in a cool, dry place, away from direct sunlight and moisture. Keep them in their original packaging until use to prevent contamination or physical damage.
5. Are there alternatives to this filter for finer or coarser filtration?
For finer filtration, consider Whatman filters with a 0.22?m pore size, while coarser options like 0.8?m or 1.2?m may be suitable for less demanding applications. Always match the pore size to your specific requirements.
